How Muscle Cars Work

Muscle Cars Overview

"Muscle car" describes an American automobile with lots of power, modest weight, and blazing acceleration. The term was coined in 1964 for midsize Pontiacs equipped with a new performance option featuring a potent 389-cubic-inch V-8. The option turned a tame Tempest into a snarling GTO. Right off the showroom floor, a properly equipped "Goat" could run 0-60 mph in under 7.0 seconds -- awesome performance in 1964.

The Quickest Muscle CarsFor profiles, photos, and specifications of four of the quickest classic-era muscle cars, check out: Chrysler unleashed the modern version of its most famous engine as the 1964 Dodge 426 Hemi. The 1964 Ford Thunderbolt shoehorned a 427-cid V-8 into its midsize body and set out to defend the blue oval's honor. A race-proven, all-aluminum 427-cid V-8 defined the rare and wicked 1969 Chevrolet Camaro ZL1. It stood for "Central Office Production Order" and helped create some immortal muscle cars, including the 1969 Chevrolet Chevelle COPO 427.

America had produced fast, powerful cars since well before World War II. So had various European automakers. But most of these were expensive rarities, purchased by monied upper-crust types with a need for speed. The muscle car was a mass-market child of 1960s America, when youth was king and Detroit ruled the automotive world.

That world was changing radically by 1970, and muscle cars nearly vanished. But they came back in the early '80s to begin an exciting new high-performance era that's still going strong, thanks to huge technical progress since the 1964-70 "golden age." Indeed, many modern muscle cars outgun their revered 1960s ancestors yet are thriftier with fuel, pollute much less, and are far superior for handling and safety.

This article tells the muscle car story, from the inception of the breed to its near disappearance to its revival in the form of today's road rockets. The article also places the muscle car in the
context of American culture and examines how Baby Boomer nostalgia for these factory hot rods is driving the price of some restored versions into six figures, and sometimes above. Here's a sneak peek at the various sections:

• The Birth of Muscle Cars
  Learn how the speedy 1949 Oldsmobile Rocket 88 fired the public imagination and ignited a Detroit horsepower race that produced a slew of "factory hot rods." In the 1950s, Chrysler unveiled its Hemi engine, and Chevrolet its small-block V-8. It was all a preview of muscle cars to come.
  
  

• Early Muscle Cars
  Follow the escalation of the performance wars into the early 1960s, as automakers vied for supremacy on racetracks, drag strips -- and sales charts. Muscle cars broke into pop culture as the Beach Boys celebrated Chevy's "real fine" 409, and there was no stopping the phenomenon.
  
  
• The Golden Age of Muscle Cars: 1964, 1965
  Gas was cheap, the economy strong, and change was in the air. Young hotbloods turned on to the fast, good-looking Pontiac GTO; competitors took note, and muscle cars soon rumbled out of most every showroom. This period delivered to the automotive world such hallowed names as the Mustang, 4-4-2, Barracuda, and Chevelle Super Sport. Read all about muscle cars in 1964 and 1965.
  
  
• The Golden Age of Muscle Cars: 1966, 1967, 1968
  Find out how big V-8s in midsize bodies became the defining muscle car formula. The mighty Street Hemi in intermediate Dodges and Plymouths was the recipe at its most potent. Pony cars also rose to the task, with the likes of the Shelby Mustang, Camaro Z-28, and even the AMX from American Motors. And the muscle car scene was shaken up with the arrival of the budget-priced Plymouth Road Runner.
  
  
• The Golden Age of Muscle Cars: 1969, 1970
  Revel in the peak period for classic muscle cars, with horsepower, speed, and flamboyance hitting unprecedented heights. Hood scoops, spoilers, and stripes flourished, and new cars like the Hemi 'Cuda, LS6 Chevelle, and Boss 429 Mustang, all introduced in this white-hot period, became destined for the collector's market.
  
  
  Muscle Car Image Gallery
  

©2007 Publications International, Ltd. Chrysler engineers used their hot-rodding know-how to build one of the coolest muscle cars ever: the 1969 Dodge Super Bee Six Pack. See more pictures of muscle cars.

• Muscle Cars and American Culture
  The muscle car aura was one of rebellion, excitement, and youth. Discover how it both reflected and influenced American society in the 1960s and early '70s. Automakers, aftermarket parts manufacturers, Hollywood, and Top 40 music all sought their piece of the pie and, in turn, created lasting cultural icons.
  
  
• The Death of Muscle Cars
  In many ways and for many reasons, America lost its innocence in the 1960s. Learn why no-holds-barred performance cars were just one casualty of wrenching social changes. Muscle cars began fading away in the 1970s, and most were gone by mid-decade, victims of a changing market and increasingly strict government regulations.
  
  
• The Rebirth of Muscle Cars
  Reports of the death of muscle cars were greatly exaggerated. Explore why muscle cars never really were absent from America's automotive consciousness and how, by the late 1970s, Detroit had found a way to make high performance compatible with new safety and emissions regulations. Mustang, Camaro, and Firebird Trans Am led the way back.
  
  
• Midsize Muscle Cars in the 1980s and 1990s
  Check out the ballistic Buick GNX of 1987 and the midsize muscle car resurgence it symbolized. The Hurst/Olds, Monte Carlo SS, and Ford Thunderbird were among the beloved badges that helped revive classic-style intermediate-size performance.
  
  
• Modern Muscle Cars
  Buckle up for a ride as wild as anything available in the heyday of original muscle cars. Modern technology has combined with good-old speed-hungry engineering and wily marketing to create a new golden age of high performance. Now, 400 horsepower engines are common, as are quarter-mile times under 13 seconds. Hemi, Cobra, GTO, even Challenger and Camaro are on the docket once again.
  
  
• Baby Boomers and Muscle Cars
  A 1970 Plymouth Hemi 'Cuda convertible that originally listed for around $6,000 sold at auction in 2006 for $2.1 million. Men and women who coveted great muscle machines when they and the cars were both younger are paying big bucks to recapture that excitement. Find out how Baby Boomers have kept classic muscle cars at the forefront.

©Barrett-Jackson Nostalgic Baby Boomers are driving up prices of classic muscle cars. This 1969 Chevrolet Camaro SS Baldwin-Motion SuperCoupe fetched $486,000 at the 2006 Barrett-Jackson Auction in Scottsdale, Arizona.

Muscle cars have a rich, exciting history -- so let's get moving and learn more about them!

Return to Muscle Car Information Library.

For more cool information on muscle cars, see:

• Muscle cars came in many shapes and sizes. Here are features on more than 100 classic muscle cars, including photos and specifications for each model.
• Buick, GM's "gentleman's car" division, was an unlikely source of some of the finest muscle cars. See profiles, photos, and specifications of Buick muscle cars.
• Dodge muscle cars were among the fastest and wildest.

The Birth of Muscle Cars

Someone once said auto racing began when the second car was built. For more than 100 years now, competition has driven both technology and sales in the car business -- hence the old industry maxim, "race on Sunday, sell on Monday." And it's true. That, in a nutshell, explains how muscle cars came to be.

The Hard-Charging Muscle Car RostersCertain muscle car rosters had a special luster. Among these were: The muscle car formula of maximum performance for minimal money played to Chevrolet's strength. Chevy muscle cars represented the most extensive and most popular lineup of any manufacturer throughout the 1960s and early 1970s. Dodge muscle cars were all stars throughout the classic age of muscle cars, a leadership reasserted with today's revived Hemi V-8 and plans to resurrect the Challenger. Plymouth muscle cars spanned the spectrum from fanciful to fearsome -- and sometimes displayed both qualities in a single model. Pontiac's lasting claim to muscle car fame stems from a stroke of marketing genius that earned Pontiac credit for igniting the classic muscle car era. But there was more to Pontiac muscle cars than just the GTO.

Two types of motorsport play especially large roles in muscle car history. One is stock-car racing, which began coming together once some "good ol' boys" formed the National Association for Stock Car Auto Racing in 1947.

Inspired by the souped-up cars of Southern moonshine runners and their skill at escaping the law, NASCAR began staging races on dirt tracks and beach courses. These events drew crowds and soon developed into a thriving business. Other organizations, such as the U.S. Automobile Club, began sanctioning their own stock-car races.

Drag racing, meanwhile, was attracting its own fans. These organized contests of quarter-mile acceleration originated with the informal (and illegal) street racing associated with hot rodders, the shade-tree mechanics who turned old Model T and Model A Fords into fast, eye-catching street cars. Drag racing gained momentum in 1951 when the National Hot Rod Association was formed in -- where else? -- car-crazy Southern California.

At about the same time, NHRA chief Wally Parks started Hot Rod magazine to promote the sport and performance-tuned street cars. The early '50s also saw the debut of Motor Trend and other car-enthusiast magazines, the first of many.

The growing public interest in speed and power gave birth to what many regard as the first muscle machine, the 1949 Oldsmobile Rocket 88. It was a car any hot-rodder could understand: a powerful new engine in the lighter Olds body. And the engine was a breakthrough: America's first high-compression overhead-valve V-8, the result of research begun at General Motors well before the war.

Though GM's Cadillac Division introduced a similar V-8 for '49, it was the smaller, fleeter Olds 88s that grabbed public attention, especially when they started to dominate stock-car racing.

Because success in Detroit never goes unchallenged for long, the Rocket 88s soon had showroom competition and a horsepower race was on. By 1955, most every U.S. nameplate offered light, efficient V-8s. Two of the best remain performance legends to this day.

One was Chrysler Corporation's Hemi, first offered for 1951 and named for the half-sphere or hemispherical shape of its combustion chambers. No less significant was the 1955 Chevrolet small-block V-8, a design so right that its basic engineering concepts are still in production.

But the horsepower race wasn't always about sheer speed. Detroit would soon learn the importance of giving its hot cars names and marketing directions that matched their tire-smoking excitement.

©2007 Publications International, Ltd. Here's an early ad promoting the new speed and power Chevy was offering its customers in 1955.

Because bigger meant better in the Fabulous '50s, Detroit cars put on pounds and inches most every year, requiring ever-larger engines just to maintain existing levels of acceleration. But many buyers were still willing to spend on extra speed, and automakers responded with all kinds of performance-enhancing heavy-duty parts and power-boosting options. Most of these were developed just to satisfy racing rules -- and car company pride. Seldom ordered by mainstream buyers, these "speed parts" nonetheless promoted a sales-boosting performance image.

Thus Dodge, for example, offered powered-up "D-500" engines for every model in its 1956 line, including the lightest low-line two-door sedan -- which, of course, was the racers' choice.

Other makes showcased performance hardware in flashy limited-edition models. Chrysler led the way with its 1955 C-300, an inspired blend of Hemi power and luxury-car trappings that fast became the new star of NASCAR. With 300 horsepower, it was rightly advertised as "America's Most Powerful Car."

©2007 David Temple The 1955 Chrysler C-300 was touted as "America's Most Powerful Car."

The following year's 300B achieved the long-sought engineering ideal of one horsepower per cubic inch of engine displacement. For 1957, Chevrolet wooed leadfoot buyers with available fuel injection, Ford and Studebaker with supercharging. Pontiac offered both fuel injection and "Tri-Power" (three two-barrel carburetors). Even troubled Hudson, limited to large 6-cylinder engines through 1954, managed NASCAR-winning "Twin-H Power" dual carbs and manifolds, plus a hot "7-X" racing mill.

All this muscle flexing screeched to a halt in early 1957. Detroit's carmakers, through their Automobile Manufacturers Association, agreed to a self-imposed "ban" on factory-sponsored racing and performance-oriented advertising. Publicly, the industry was bowing to pressure from an increasingly vocal safety lobby. Privately, it was business as usual.

Engineers kept working on even hotter engines and other under-the-table racing support, expecting that high performance would soon be politically correct again. They were right, as you'll see on the next page.

Return to Muscle Car Information Library.

For more cool information on muscle cars, see:

• Muscle cars came in many shapes and sizes. Here are features on more than 100 muscle cars, including photos and specifications for each model.
• Even American Motors, the champion of the economy car, caught muscle car fever. See profiles, photos, and specifications of AMC muscle cars.
• The phrase Mercury muscle cars was no contradiction in terms; even this staid marque had a quick-car lineup.

Early Muscle Cars

Automotive high performance came out of hiding in 1960, signaling the dawn of the classic age of muscle cars. V-8s had been bulking up, so "big-blocks" were a must on and off the track. Chrysler Corporation had a fleet of V-8s with wedge-shaped combustion chambers with up to 413 cubic inch displacement and over 400 bhp via "Cross Ram Induction." Hemis were in limbo as expensive to build, but wedge-powered Chryslers, Plymouths, and Dodges were usually in the hunt among stockers and dragsters.

©2007 Publications International, Ltd. Peformance cars such as the 1961 Chevrolet Impala SS 409 began to fill the marketplace in the early 1960s.

Ford took its sturdy FE-Series V-8 to 390 cid for 1961, then to 406. Chevrolet, meanwhile, turned its 348 into a brawny 409, soon immortalized by the singing Beach Boys. Pontiac, having gone from staid to sassy in the late '50s, kept spinning out variations of its 389-cid V-8 and then issued a "Super Duty" 421 for favored drag racers. And all over Detroit, parts catalogs bulged anew with go-fast components.

The Best of Early Muscle CarsIn the early days of muscle cars, an automaker's full-size models were also its high-performance machines. Check out some of the best of these early muscle cars: Celebrated in story and song, the 1961 Chevrolet Impala SS 409 was an instant legend. The brutal Max Wedge 413 put Mopar muscle on the map, and cars like the 1962 Dodge Dart 413 in the winner's circle. "Total performance" was the company's slogan for 1963, and that's what a 425-bhp 1963 Ford Galaxie 427 delivered. The available lightening- hole "Swiss Cheese" frame was a clue to the true intent of the 1963 Pontiac Super Duty 421.

Performance models also multiplied. Chevrolet, for example, added Super Sport Impalas with bucket seats, floor shift, tachometer, beefed-up suspension, and special trim. The 409 V-8 was sold separately. The '61 Chevys introduced a svelte new rear roofline. Ford's new-for-1960 Galaxie Starliner hardtop was the same idea.

Though neither was designed particularly for racing, "aero" styling like this proved crucial on NASCAR's new high-speed ovals, where a few extra mph could mean the difference between first and second place. And the fun had only just begun.

The American car landscape itself had expanded in 1960, when Detroit introduced small economy compacts to supplement traditional full-size "standard" models. Many buyers preferred something in between, however, so the midsize car was a logical next step.

Ford had a popular "Better Idea" with its new-for-'62 Fairlane and Mercury Meteor intermediates. Arriving with them was a lively, high-tech small-block V-8 (in 221- and 260-cid sizes) that would soon become a bona fide performance mill. Dodge and Plymouth also offered intermediates for 1962, but unlike Ford and Chevrolet, dropped their big cars.

The result for Dodge and Plymouth was a sales disaster but an exciting new kind of performance car: much trimmer and lighter, and available with big-car power. Quicker than you can say elapsed time, these smaller Dodges and Plymouths were the cars to beat in NHRA's new Super/Stock class.

They remained so in 1963, when the Dodge Ramcharger/Plymouth Super Stock wedges went to 426 cid, good for up to an advertised 425 bhp, and much more in the hands of expert tuners. Wedge 426s set eight NHRA records right out of the box, and Hot Rod clocked a scorching 12.69-second quarter-mile in a Super Stock Plymouth with automatic and a tight axle ratio.

©2007 Publications International, Ltd. Despite its high horsepower, the 1962 Ford Galaxie 406 was a bit too heavy to beat its rivals on the track.

Of course, rockets like this were rare on Main Street, but they added high-powered sales luster in showrooms and made a huge impression on the public. The classic age of muscle cars was at hand.

The next page dives into the classic period of muscle cars, as hot machines with big engines became the darlings of Detroit and changed America's automotive landscape.

Return to Muscle Car Information Library.

For more cool information on muscle cars, see:

• Muscle cars came in many shapes and sizes. Here are features on more than 100 muscle cars, including photos and specifications for each model.
• Some of the best all-around performance machines of the day were Ford muscle cars.
• No muscle cars were more stylish, sophisticated, or brawnier than those from Oldsmobile. Check out profiles, photos, and specifications of Oldsmobile muscle cars.

The Golden Age of Muscle Cars: 1964, 1965

Few cars have been better timed than the Pontiac GTO. Though not a brand-new idea, it tapped into the spirit of mid-'60s America and would be the standard for every muscle car imitator that followed. From the get-go, there was little doubt the GTO would be imitated.

©2007 Publications International, Ltd. The 1964 Pontiac Tempest GTO was the ultimate muscle car trendsetter.

Pontiac thought it might sell 5,000 the first year and ended up moving over 32,000. General Motors' "Wide-Track" division was well known for performance, but it was clearly on to something new here. It's as if most every performance trend of the preceding 15 years had been leading to this one car.

Great Muscle Cars From 1964 and 1965These are some of the muscle cars that helped define the classic years of 1964 and 1965: The 1964 Pontiac Tempest GTO lit the fuse on the muscle car boom by giving the small-car, big-engine ethic a cool identity. The 1964 Oldsmobile Cutlass 4-4-2 launched the original muscle car maker into the heart of '60s high performance. The 1965 Chevrolet Chevelle SS 396 brought big-cube muscle to America's top-selling midsize car.

The GTO is generally credited to Pontiac ad man Jim Wangers, but it was engineers Bill Collins and John Z. DeLorean who put it on the road. They made it an option package to get around a GM rule prohibiting midsize cars with standard engines over 330 cid, which only fostered a "bad boy" image that was part of the car's appeal.

Stealth was another attraction. Save a black-finish grille, discreet emblems, and a hood with two small dummy air scoops, a GTO looked like any midsize Tempest coupe, hardtop coupe, or convertible. Likewise, the interior was basically bucket-seat Tempest LeMans. So unless you gunned that potent 389 V-8, John Law probably wouldn't notice. Leadfoots loved that.

In truth, the GTO was a marketing exercise, a hot blend of cherry-picked components already on the shelf. Yet it was somehow more than the sum of its parts, a celebration of tire-spinning torque and head-spinning style -- a hero car. And with prices as low as $3,200, it was a tremendous value. Needless to say, it soon had company.

Not surprisingly, perhaps, the GTO's first challenger came from Oldsmobile, home of the Rocket, which announced its 4-4-2 package at almost the same time. This was available for any non-wagon Cutlass, which shared a basic design with the Tempest/GTO, Buick Skylarks, and Chevrolet's new midsize Chevelles.

The designation meant 4-barrel carb, 4-speed manual transmission, and 2 exhausts. The V-8 was a 330 pumped up to 310 bhp. Though that was shy of the Pontiac's 325 or 348 bhp, critics thought the 4-4-2 handled a bit better, and it proved nearly as fast in the benchmark 0-60 and quarter-mile tests. Olds sold just 2,999 of the '64s, mainly due to poor promotion, but that mistake would not to be repeated.

There was plenty more excitement in 1964. Dearborn made headlines with "Total Performance," an all-out assault on most every form of motor sports, a campaign designed to boost sales of racy new Fords and Mercurys for the street. Ford spared no expense, whipping up rally-winning Falcon compacts, a sleek maddening Ford GT40 for international endurance racing, and big Ford Galaxies that claimed the 1964 NASCAR Grand National championship.

Ford also unleashed the Thunderbolt, a meek Fairlane two-door turned drag strip terror. It used almost every trick in the speed-shop book: stripped interior, lightweight fiberglass body panels, and a dual-carb version of the year-old "Thunderbird 427 Super High Performance" V-8, a big-block that shoehorned in only with considerable bending of front-chassis metal.

Just 127 were built, and only in '64, but the T-bolt was unforgettable. Hot Rod warned it was "not suitable for driving to and from the strip, let alone on the street." But that was the point. Ford was serious about high performance on and off the track. So was everyone else.

And then there was Ford's Mustang, the smash sales success of the '60s. Arriving midway through model-year '64, this sporty compact took the country by storm with its low price, jaunty looks, and long options list. And though not marketed on muscle at first, Mustangs could be pretty hot with an available small-block V-8, including a new 289-cid version with up to 271 bhp. Ford sold nearly 681,000 in just the first 12 months, establishing another new market category, the pony car.

Over at Chrysler, the famed Hemi V-8 returned during 1964 as a 426-cid monster built strictly for racing. Rated at 425 bhp but easily race tuned for well over 550, it cleaned up in various NHRA classes during the '65 season.

Things were tougher in NASCAR. Though Richard Petty and his midsize Hemi Plymouth easily won the 1964 Daytona 500, Ford was still season champ. Moreover, NASCAR thought the Hemi gave Mopar teams an unfair advantage, so it banned the Hemi for the first half of the '65 season, then let it back in after protests from all over.

But the trend was clear. On speedway, strip, and street, the performance action was fast shifting from big cars to muscular midsizers and even high-powered pony cars. Buyers were thinking young and craving four-wheel excitement. Detroit wooed them year after year with sporty new models packing ever-more power. Even the first federal safety and emissions regulations didn't spoil the party.

It was all about winning hearts, minds, and dollars, which meant having the best stats in car-buff magazine tests, winning races, and wowing buyers. That's always been the game, of course, but seldom have so many automakers, along with hundreds of independent speed-equipment companies that sprang up to supply soup-up parts, played for such high stakes.

©2007 Publications International, Ltd. Although only 127 were built, the 1964 Ford Thunderbolt made its mark on muscle car culture.

For performance fans, there was something for almost every taste and budget. In 1965 alone came the posh Buick Skylark Gran Sport; a big-block 396 Chevelle Super Sport; and a track-ready Mustang, Carroll Shelby's GT-350, which fast ruled its class in Sports Car Club of America road racing.

The muscle car was quickly moving from a low-volume specialty item to a high-profile image-maker, its aura of performance and panache casting a halo over an automaker's mainstream models. Suddenly, every manufacturer had to have one, and each supercar needed more power and more personality than the next.

Evolution was too slow. Revolution was in, as you'll see on the following page.

Return to Muscle Car Information Library.

For more cool information on muscle cars, see:

• Muscle cars came in many shapes and sizes. Here are features on more than 100 muscle cars, including photos and specifications for each model.
• Chevrolet muscle cars beat at the heart of big-cube high performance.
• Plymouth muscle cars spanned the spectrum from fanciful to fearsome -- and sometimes displayed both qualities in a single model.

The Golden Age of Muscle Cars: 1966, 1967, 1968

The muscle car craze continued in 1966, 1967, and 1968. Model-year 1966 ushered in rapid, redesigned midsize Fords and Mercurys; a burly midsize Dodge fastback, the Coronet-based Charger; a quartet of smoothly restyled GM intermediates; and even a "rent-a-racer" Mustang, the Hertz-vended Shelby GT-350H.

©2007 Publications International, Ltd. Muscle pony cars hit the scene in 1967, and the Chevrolet Camaro Z-28 was one of the year's hottest.

Compacts continued to juice up, too. Ever more popular were the lively small-block options for the Chevy II, Dodge Dart, Ford Falcon, Mercury Comet, and Plymouth's "glassback" Barracuda. Full-size flyers were falling from favor, as the large-car segment was turning hard toward luxury, but there was still plenty of choice: Chevy SS Impalas, Ford Galaxie 500 XLs, Plymouth Sport Furys, the Olds Starfire, and Pontiac Catalina 2+2s.

Great Muscle Cars From 1966, 1967, and 1968To learn more about some of the most thrilling muscle cars of 1966, 1967, and 1968, see: The 1967 Oldsmobile Cutlass 4-4-2 with the W-30 induction setup hid its air intakes in the headlamp surrounds. Way cool! The 1968 AMC AMX was a high-performance machine that appealed to more than just the muscle car crowd -- sports-car enthusiasts also loved it. The 1968 Plymouth Road Runner created the budget-muscle market and was among the most influential cars of the 1960s. At last, the original pony car could show its tail to the competition thanks to the 1968 Ford Mustang 428 Cobra Jet.

Engines kept growing in 1966. Chevy replaced its 409 V-8 with a potent 427 born of NASCAR experiments. Ford bowed a hulking 428 with massive low-end torque. Chrysler's wedgehead became a 440-cid powerhouse available in midsize Dodges under the "Magnum" label.

But even that paled next to the 426 Street Hemi, a barely tamed version of the all-conquering race engine and as laughably underrated at 425 bhp. As an option costing around $1,000, it wasn't cheap. But in a Dodge Coronet, Charger, or Plymouth Belvedere, it delivered acceleration Motor Trend called "absolutely shattering."

Something new arrived for '67: the muscle pony car. That year's Mustang was redesigned with room for a 390-cid big-block option. Carroll Shelby went one better by stuffing in a 428 for his new GT-500. Mercury debuted the Cougar, a luxury Mustang that also offered big-inch testosterone.

Chevy belatedly answered Mustang with the Camaro, available with sporty RS and SS packages and potent V-8s up to a 375-bhp 396. Pontiac's similar Firebird bowed a few months later with its own hot-engine menu, topped by a 400-cid mill.

Modified pony cars put on quite a show in quarter-mile contests. Others provided road-racing excitement in the SCCA's new Trans-Am series for "production compact sedans." Camaro promptly dominated the '67 season, thanks to a track-oriented Z-28 package featuring a special 302-cid V-8 humorously listed at 290 bhp, plus a tight "handling" suspension. It hugged the corners, but was muscle-car quick on the straights; Car and Driver cracked the quarter-mile in 14.9 seconds at 97 mph.

All this seemed too good to be true, but true it was. Muscle cars were better than ever for 1968. GM, Ford, and Chrysler all issued redesigned intermediates with sleeker looks, including windcheater rooflines for most hardtops. Dodge transformed its Charger into the year's styling stunner, but Dearborn had handsome new Ford Torinos and Mercury Cyclones, while GM made two-doors like the GTO a bit smaller and lighter for more speed and agility.

Tiny American Motors surprised with its first pony car, the Javelin, and a cleverly shortened two-seat version, the AMX. Neither was in the muscle major league, but an available 390-cid V-8 provided satisfying scoot, and a few AMXs claimed trophies at the strip.

Chrysler bowed a potent 340-cid small-block for a new Dodge Dart GTS and hotter Formula S Plymouth Barracuda. The Mopar compacts also got a first-time big-block option, a 300-bhp 383. Power-boosting cold-air induction was a new trend, available at Pontiac as "Ram Air" and for Fords and Mercurys ordered with a beefy new Cobra Jet 428.

Muscle car prices had been creeping beyond the reach of many enthusiasts, so Plymouth's 1968 Road Runner was welcome news. Starting at just $2,986, this pillared coupe or hardtop coupe delivered a 335-bhp 383, heavy-duty chassis and running gear, and few frills to detract from performance. The only option, in fact, was the mighty 426 Street Hemi.

With a smile-inducing "beep-beep" horn and matching cartoon logo, the Road Runner drew a smashing 45,000 sales in its first year to create another new category, the budget muscle car. Dodge joined in at midyear with a stripper Coronet coupe, the Super Bee, priced from $3,037 as part of the brand's "Scat Pack" performance line.

©2007 Publications International, Ltd. Beep, beep! The 1968 Plymouth Road Runner zoomed past the competition, selling 45,000 cars in its first year.

But troubles were brewing. Federal safety and emissions rules came in for 1968, a possible threat to the muscle car's future. So was a new safety lobby, led by crusading attorney Ralph Nader.

No less worrisome was fallout from the fierce competition in the muscle market. In 1966, the GTO set a one-year muscle car sales record of 96,946. As the market saturated, most muscle cars were drawing far fewer yearly sales; some were barely in the hundreds. And though Detroit bean counters knew performance helped move the mom-and-pop models, racing programs and muscle car development costs were spiraling upward, eating into profits.

Nevertheless, market demands and corporate pride were about to take the muscle car to its very peak, as you'll see on the next page.

Return to Muscle Car Information Library.

For more cool information on muscle cars, see:

• Muscle cars came in many shapes and sizes. Here are features on more than 100 muscle cars, including photos and specifications for each model.
• Even American Motors, the champion of the economy car, caught muscle car fever. See profiles, photos, and specifications of AMC muscle cars.
• Some of the best all-around performance machines of the day were Ford muscle cars.

The Golden Age of Muscle Cars: 1969, 1970

If there were signs in 1969 and 1970 that the classic age of muscle cars was nearing an end, you couldn't tell by perusing American automobile showrooms. Dealerships were bursting with ever-more-powerful and outrageous high-performance machines -- muscle cars were at their pinnacle.

The 1969 field featured a slew of limited-edition street machines built to qualify for racing. The Mustang Boss 302 and Firebird Trans Am answered the Camaro Z-28 in SCCA. NASCAR needs prompted an aero-styled Dodge Charger 500 and a heroically winged Charger Daytona, plus a "droop-snoot" fastback Ford Torino Talladega and Mercury Cyclone Spoiler II.

©2007 Publications International, Ltd. Motor Trend called the 1970 Buick GSX "the quickest American production car we have ever tested."

The budget-muscle ranks expanded with the Torino Cobra and a lower-priced GTO, The Judge. Oldsmobile reprised a Cutlass-based Hurst/Olds package with "Forced Air" induction on a colossal 455-cid V-8, plus flashy gold striping and, of course, a Hurst shifter.

Great Muscle Cars From 1969 and 1970 For profiles, photos, and specifications of cars that marked the pinnacle of muscle car madness see: ­The 1969 Yenko Camaro 427 got its name from Chevy dealer Don Yenko and its muscle from a sneaky engine transplant. Muscle got no meaner than the 1969 Dodge Super Bee Six Pack, named for the three Holley two-barrels on its 440-cid V-8. Few classic muscle cars looked wilder, and none had more torque, than the thrilling 1970 Buick GSX. Big size, big power, big fun -- the 1970 Ford Torino Cobra uncoiled up to 375 bhp from its ram-air 429-cid V-8.

Hood scoops sprouted like weeds. A new Mustang Mach 1 had a "shaker hood," an air intake attached to the engine that stuck up through a hole and throbbed along with the V-8. Top-power Road Runners offered a pop-up "Air Grabber" scoop. Plymouth also added brash 'Cuda packages for its sporty compact, including a formidable few with big 440s squeezed in.

For pure, unadulterated Detroit performance, 1970 was the storm before the calm. And what a perfect storm it was. Start with General Motors, where a 400-cube limited was lifted and acceleration took off. Buick's midsize muscle was now a racy-looking GS455 with 350 or 360 bhp.

There was also a new velvet-gloved iron fist called GSX packing 370 bhp in "Stage 1" guise. Motor Trend clocked one at 13.38 seconds/105.5 mph in the quarter-mile, "the quickest American production car we have ever tested."

Chevrolet replied with SS Chevelles listing big-block 396s (actually displacing 402 cubes now) and new 454s. Tops among the latter was the rare 450-bhp LS-6 version that rocketed Hot Rod through the quarter-mile in 13.4 seconds at 108.7 mph. "The future may never see a car like this," the editors said. And for a long time, they were right.

Oldsmobile shot back with a regular-production 455 option for the 4-4-2 with 365 bhp stock, 370 with the W-30 performance group. It was a wild ride, though not quite as quick as the GSX or SS 454.

Pontiac's original muscle car also added an optional 455, though rated horsepower topped out at 360. The hot "Goat" setup still was Pontiac's Ram Air 400 with automatic and a tight axle ratio, though Car Life managed a best ET of only 14.6 seconds/99.5 mph. Whatever their performance or nameplate, all of GM's 1970 muscle cars got nice updates of 1968-69 styling. And arguably, GTOs still looked the best, highlighted by a simple bumper/grille combo covered in body-color Endura plastic.

GM also heated up the 1970 pony car scene with a redesigned Chevrolet Camaro and Pontiac Firebird. Their convertibles were dropped, but the new coupes had shapely lines that some thought quite European. SS Camaros offered Chevelle's new 402/396-cid V-8, but the racy Z-28 moved to a 360-bhp solid-lifter 350 borrowed from the Corvette. Pontiac's pony car again offered four flavors, with the hottest Firebird 400s and Trans Ams listing up to 370 bhp with new Ram Air shaker hood.

Chrysler, meantime, finally got serious about pony cars, trotting out a burly new 1970 Barracuda and an even huskier Dodge Challenger. Both listed Hemi and 440 V-8 options, though only a relative few were ordered that way; most buyers were quite happy with the strong 340- and 383-cid V-8s, both of which comfortably delivered more than 300 bhp.

Also rare among Mopar's 1970 ponys were the Challenger T/A and AAR 'Cuda featuring super-tuned 340 small-blocks and built to qualify the cars for Trans Am racing. Qualify they did, joining Camaros, Firebirds, Mustangs, Cougars, and upstart AMC Javelins to make for the most competitive and exciting Trans Am season ever. In fact, 1970 stands as the series' high-point. Mustang claimed the championship.

©2007 Publications International, Ltd. The 1970 Dodge Challenger T/A was patterned after a Trans Am race car.

Plymouth was the year's winningest name in NASCAR, thanks to Richard "The King" Petty and his high-wing, bullet-nose Road Runner Superbird. The Bird was much like 1969's Dodge Charger Daytona but saw 1,920 assemblies versus 503 for the Daytona.

Dearborn made muscle news with restyled Ford Torinos and Mercury Cyclones offering new high-performance Cobra Jet 429s with 360-375 bhp. The same basic mill also powered a drag-worthy Boss 429 Mustang, carried over from '69, and the Mercury Cougar Eliminator. Otherwise, 1970 was a quiet year for Ford performance -- ominously so, after the company abruptly ended its memorable "Total Performance" program.

It was a sign of changing times. From here on, muscle cars would never be the same. But their influence on American culture was broad, deep, and lasting. Read about that impact in the next section.

Return to Muscle Car Information Library.

For more cool information on muscle cars, see:

• Every major American automaker had a muscle car lineup. See these profiles of the muscle car manufacturers.
• The 1961 Pontiac Ventura 389 was among the most stylish early muscle cars.
• Any 1971 Chevelle could wear a Super Sport badge, but only the 1971 Chevrolet Chevelle SS 454 earned the right to display its engine size, too.

­

Muscle Cars and American Culture

Speed and power are compelling qualities, so it's no surprise that muscle cars were such a happening back in the 1960s and continue to hold an allure that transcends decades and generations. Indeed, generating a buzz that struck a chord with something uniquely American was a prime reason for creating these fast-and-furious machines in the first place.

It was all about marketing and the bottom line. Most people didn't need, say, a GTO, but the GTO's wild image would compel more than a few to buy a mild-mannered Tempest LeMans with much the same style. That's how muscle cars had such a big market impact even though they didn't sell in big numbers.

Muscle Cars That Reflected American CultureFor the inside scoop on some muscle cars that reflected 1960s and 1970s American culture, see: Authority figures were there to be chided, and the 1969 Pontiac GTO Judge was in on the joke. Campiness was groovy, and a far-out mad scientist was behind the 1969 Hurst/Olds. Flower-power colors, op-art graphics were the rage and helped muscleheads turn on to the 1970 Plymouth Road Runner Hemi.

The GTO, remember, was a marketing man's idea designed to get people talking about Pontiac and to lure them into showrooms. But muscle cars had to keep faith with performance fans, whose opinions often persuade non-enthusiast friends what car to buy. That required credibility in competition. Enthusiasts are demanding, and they won't talk your talk until you walk their walk.

That's why automakers worked hard to make sure their muscle cars not only looked cool but also had a winning reputation. Sometimes, the work was a bit shady. For example, despite Detroit's admonishments to leave demonstrations of speed to the organized confines of NHRA and NASCAR, young hotbloods still raced the public streets and roads in the 1960s. They were
defying the law, but rebellion was hip in those days.

The action was intense, emotions ran high. Fittingly, Detroit's Woodward Avenue was one of the most popular spots for outlaw street racing. And because of that, it became unofficial proving grounds for new manifolds, carburetors, and other speed parts devised by the automakers themselves. Many executives tacitly encouraged such "research" and even participated. After all, everyone else was there, so why not see what you were up against? As for manufacturers who didn't make the street scene...well, that news got around, too.

Such underground support is part of muscle-car lore. So, too, the highly visible new-car dealers that set up "speed shops" to improve on what their factories were doing. Because of their high sales volume, these dealerships were typically the first to sell the latest factory parts, but many also developed their own speed equipment, then built and sponsored race cars to show it off, usually in drag racing. It was just good business to sell performance where performance fans gathered.

Among the best-known of these dealers were Nickey Chevrolet and "Mr. Norm's" Grand Spaulding Dodge, both in Chicago; Yenko Chevrolet in Pennsylvania; Royal Pontiac in Royal Oak, Michigan; and Ford-affiliated Holman-Moody in North Carolina.

©2007 Publications International, Ltd. Royal Pontiac in Royal Oak, Michigan -- whose name is displayed on this race car -- was among the best-known "speed shops."

"Muscle mania" was also good for the performance "aftermarket" companies that began appearing in the 1940s. Names like Hurst (shifters), Edelbrock (manifolds), Iskenderian (camshafts), and others were well known to gearheads from car magazines and prominent race-car logos. In the '60s, these parts-makers boomed as never before, which prompted even more companies to weigh in.

By the end of the decade, the industry had grown so large that it formed its own trade group, first called the Speed Equipment Manufacturers Association, later the Speed Equipment Market Association (SEMA).

But there was another side to the muscle car scene -- and man, was it groovy. For all their raw power and rumbling machismo, muscle cars had a playful side reflecting the trendy irreverence of the youthful '60s counterculture. It was the era of do-your-own-thing and pop art, of "mod" fashions and Beatle haircuts, folk songs, acid rock and the British invasion. Automakers found creative ways to relate to this market.

Wild colors were in vogue, so American Motors offered bright "Big Bad" hues for 1969-70. Dodge and Plymouth had a "High Impact" palette with wacky names like Tor-Red, Plum Crazy, and Go-Man-Go. Plymouth's Road Runner touched off a minor craze for cartoony model names and logos.

The 1968 Super Bee, for example, inspired the "Scat Pack" line of hot Dodges with available bumblebee tail stripes bearing a helmeted character bee speeding along on dragster-size wheels. Ford borrowed Carroll Shelby's raring-snake mascot for the Torino Cobra and other purposes. The '69 GTO Judge was a knowing nod to "Here Come da Judge," a popular phrase from the hit TV show "Laugh-In."

©2007 Publications International, Ltd. The doctor was in at Oldsmobile. The automaker used a fictitious "Dr. Oldsmobile" in advertisements to introduce its hot new muscle cars.

Commercials and print ads also played to youth culture. Dodge portrayed "White Hat Guys" and a "Dodge Rebellion." British pop singer Petula Clark crooned that you should "Look What Plymouth's Up to Now." Ford pitched some sportier models as "The Lively Ones," and sponsored a like-named TV show to boot. Even Buick wanted to "Light Your Fire."

Chevrolet's Camaro launched as "The Hugger." Pontiac said all its cars "take the fun of driving seriously." A fictitious "Dr. Oldsmobile," white smock and all, was frequently seen working in his lab on hot new numbers for that GM brand. AMC promoted a muscular 1970 hardtop by giving away stickers with the phrase "Up with the Rebel Machine."

Hollywood, never slow to spot a trend, only added to a growing muscle car mystique. Three films in particular still rate high among performance fans for high-powered thrills: "Vanishing Point," "Two-Lane Blacktop," and "Bullitt."

©2007 Publications International, Ltd. Muscle cars made their mark on Hollywood. The 1968 Ford Mustang, for instance, had a starring turn in the Steve McQueen classic "Bullitt."

And let's not forget all the hit '60s songs celebrating fast cars and good times. The Beach Boys alone cranked out "409," "Shut Down," and "Fun, Fun, Fun" (when daddy takes the T-Bird away), plus lesser ditties like "Car Crazy Cutie," "Our Car Club," and "No-Go Showboat." Jan and Dean sung about the "Little Old Lady from Pasadena" with a Super/Stock Dodge, plus the dangers of "Dead Man's Curve." Ronnie and the Daytonas had kids boogalooing to little "GTO," with lyrics credited to Pontiac promotions man Jim Wangers himself. Wilson Pickett idolized "Mustang Sally."

The songs, the slang, the street scene, and all the rest that made up muscle car mania were great fun. Over time, muscle cars would be rediscovered and even resurrected, but only after a trying decade in which the breed seemed doomed to extinction. That dim period is chronicled on the next page.

Return to Muscle Car Information Library.

For related car information, see these articles:

• The engine is what gives a muscle car its flamboyant personality. To learn everything you need to know about car engines, see ­How Car Engines Work.
• Muscle cars wouldn't have much muscle without horsepower -- but what exactly is horsepower? How Horsepower Works answers that question.
  
• NASCAR race cars embody the muscle car philosophy of power. Read How NASCAR Race Cars Work to find out what makes these charged-up racers go.
• Are you thinking of buying a 2007 muscle car, or any other car? See Consumer Guide Automotive's New-Car Reviews, Prices, and Information.

The Death of Muscle Cars

In many ways and for many reasons, America lost its innocence in the 1960s, and no-holds-barred performance cars were just one casualty of wrenching social changes. Muscle cars began fading away in the 1970s. Most were gone by mid-decade, victims of a changing market and increasingly strict government regulations. A precious few managed to hang on longer, but only as meek reminders of their '60s selves.

The decline was perhaps inevitable. Demand for big, fast, thirsty cars dried up as rising gas prices and hefty insurance premiums had many buyers looking at thriftier, more affordable Detroit compacts and imported minicars. At the same time, progressively tighter limits on tailpipe emissions forced automakers to detune engines via lowered compression ratios, fewer carburetors, more restrictive intakes, and other power-sapping measures. New Federal Motor Vehicle Safety Standards called for adding crash-protection features such as bigger, sturdier bumpers that added performance-sapping weight.

While these harsh realities compromised all cars to some degree, muscle machines fared the worst by far. They did, after all, have the most to lose.

The Last Great Muscle CarsFor profiles, photos, and specifications of some of the last great muscle cars of the classic period, see: The compact 1971 AMC Hornet SC/360 was a "sensible" vehicle that signaled the twilight of the muscle car era. The 1971 Ford Mustang Boss 351 was the last Boss and, with a 330-bhp solid-lifter 351-cid ram-air V-8, among the best. Packing a 455-cid V-8, the 1971 Pontiac Firebird Trans Am featured the biggest engine ever put in a pony car.

Signs of loss appeared as early as 1971, when General Motors' engines and some Chrysler Corporation mills were recalibrated to run on regular-grade gas instead of premium. That same year, GM switched its advertised engine ratings from gross figures to more-realistic net numbers, which made the power and torque losses look even worse on paper. American Motors, Chrysler, and Ford followed suit for 1972, when many engines were further detuned for newly required low-lead fuel.

Then, in October 1973, the Organization of Petroleum Exporting Countries (OPEC) drastically curtailed oil exports to the United States, touching off a national energy crisis marked by widespread fuel shortages, record gas prices, and long lines at the pumps, among other discomforts.

Though the crisis lasted but a few months, it exposed America's growing dependence on foreign energy sources that might not be so predictable. It also rattled Congress into enacting a Corporate Average Fuel Economy law (CAFE), starting with 1978 models that required automakers to meet progressively higher minimum-mpg targets against the threat of hefty fines.

With all this, plus inflation-fueled "sticker shock" price increases, demand for muscle cars decelerated fast. By 1975, the casualty count included most big-block engines and such icon performers as the Buick GS, Chevrolet Chevelle Super Sport, Dodge Charger R/T and Super Bee, Ford Torino Cobra, Mercury Cyclone Spoiler, and Plymouth GTX. Even the hallowed GTO wasn't spared, reduced for 1974 to a largely dress-up option for Pontiac's Ventura compact before the name was belatedly retired. Other heavy-hitters, such as Plymouth's Road Runner, shifted steadily from go to show.

©2007 Publications International, Ltd. This 1978 Plymouth Road Runner was a mere shadow of the classic Road Runners from the late 1960s.

Pony cars all but disappeared, with only the Chevy Camaro and Pontiac Firebird left to carry the torch after '74. Ford's Mustang, the original pony, was super-sized for 1971-73, then re-imagined as a high-class economy compact. This Mustang II was fortuitously timed and very popular, but made Mustangers wince even after an optional 302 V-8 returned after a year's absence. Mercury's Cougar? Morphed into obscurity a luxury intermediate.

But it wasn't all bad news. Despite the increasingly hostile climate, a few '70s cars did offer performance kicks, if not the tire-shredding thrills of old.

Heading the list of performance survivors were the "mini-muscle" compacts that began appearing in the early '70s. Sometimes called "insurance beaters," they offered satisfying go from torquey small-block V-8s yet cost far less to buy and operate than '60s-style midsizers.

For example, the 1971-73 Plymouth Duster 340 and Dodge Demon/Dart Sport 340 offered up to 240 net bhp, plus nifty fastback coupe styling, eye-grabbing colors, and enough tape stripes and black accent paint for a Trans-Am race car. A 360 V-8 came in for '74, but for easier emissions tuning, not extra power. American Motors, Ford, and GM offered their own sporty compact confections, and though none sold that well, they brightened up an increasingly gloomy market.

So, too, the top-performing Pontiac Firebirds. Though strangled no less than other hot cars, the Firebird Trans Am and 400 bucked the market by posting higher year-to-year sales for 1973 and '74 -- just as the gas crisis was raging. Of course, it helped they had little competition by then. Still, such surprisingly strong sales convinced product planners all over Detroit that people still craved performance, especially if straight-line speed was balanced by genuine roadability, something mostly unknown in classic muscle cars.

In any case, Chevy took the hint and reinstated the Camaro Z-28 for 1977 after a two-year furlough -- and with a new emphasis on handling. GM also kept its pony cars going with remarkably adept updates to their basic "19701/2" design, meeting federal safety standards with savvy style, not short-cut clumsiness.

Meantime, the economy fast pulled out from its gas-crisis doldrums, and the 1980s approached with signs that Detroit had learned to live with "Fed regs," thus promising a return to real style and performance at last.

Perhaps the most encouraging marker was a clean-sheet 1979 Mustang and companion Mercury Capri: roadable, slick-looking new-think pony cars that admirably reconciled many conflicting demands of the day. The base engine was an economy-minded four with just 88 net bhp, but you could order 140 horses with either a turbocharged four or that old standby, Dearborn's 302 V-8. The latter returned 0-60 mph in about 8.7 seconds. That was a bit adrift of the lighter Mustangs with turbocharged four-cylinder engines, but buyers showed a marked preference for good old low-rpm V-8 torque, another fact not lost on product planners. Could a new performance era be ahead? It certainly seemed so.

Then, in spring 1979, came a second gas crunch that had buyers scurrying back to smaller cars again. Though Detroit had been "downsizing" its fleet to meet fuel-economy targets, it was tough to know how this new crisis would play out. Engineers were fast developing technology for doing more with less, but did performance have a place in this brave new world? Or would a new generation of car buyers, many weaned on economy imports, be looking for something else entirely?

On the next page, you'll see that the answer to both questions was yes. People still wanted hot cars, but not the kind their fathers knew. Times had changed. But Detroit had changed, too, and was ready to spring some surprises. The muscle car was about to be reborn.

Return to Muscle Car Information Library.

For related car information, see these articles:

• The engine is what gives a muscle car its flamboyant personality. To learn everything you need to know about car engines, see ­How Car Engines Work.
• Muscle cars wouldn't have much muscle without horsepower -- but what exactly is horsepower? How Horsepower Works answers that question.
  
• NASCAR race cars embody the muscle car philosophy of power. Read How NASCAR Race Cars Work to find out what makes these charged-up racers go.
• Are you thinking of buying a 2007 muscle car, or any other car? See Consumer Guide Automotive's New-Car Reviews, Prices, and Information.

The Rebirth of Muscle Cars

­After several years in the wilderness of a vastly changed automotive landscape, muscle cars began working their way back to the fast lane. The return to old-time power, passion, and prominence took time but proved well-nigh unstoppable once a second energy crisis passed (1979-82). With gas plentiful again and relatively cheap; many buyers eagerly embraced performance anew, even if it might be less fiery and flashy than they remembered.

The thing is, the new-age muscle cars soon matured to the point of outperforming their 1960s grandfathers: faster yet more fuel-efficient, smaller outside but no less spacious inside, and far more capable when the road turned curvy.

The Hottest Pony Cars EverThe rebirth of muscle cars depended heavily on revived pony cars. Rewind to some of the hottest muscle pony cars ever by checking out: Its "shaker" scoop throbbing with power, the 1969 Ford Mustang Mach 1 428 Cobra Jet was the muscle car Mustang fans had waited for. Trans Am racing was reflected in the raked stance and way-out graphics of the 1970 Dodge Challenger T/A. The superb 1970 Chevrolet Camaro Z28 combined a timeless new shape and Corvette's exhilarating 360-bhp 350-cid V-8.

Several factors drove this rebirth. First, the necessities of downsizing in the 1970s forced Detroit to do more with less, especially in getting more bang out of a given size engine. Second, advancing technology was making that possible. Increased use of solid-state electronics proved key to reconciling performance with fuel-economy targets and clean-air mandates.

Increasingly sophisticated engine computers greatly improved efficiency by integrating control of fuel injection, spark timing, air intake, exhaust emissions, and other functions; later on, engineers would roll in transmission behavior, valve timing, even valve lift. Electronics also benefited roadability in giving rise to antilock brakes, traction, and stability controls, and "active" suspensions that could be adjusted -- or adjusted themselves -- to suit road conditions and driving needs.

The result was a level of dynamic safety unknown in the 1960s -- important at a time when engines were muscling up again. And though all the new gizmos did add complexity, overall vehicle reliability generally improved.

Another factor in the muscle car's rebirth was the development of new manufacturing methods that allowed specialized "niche" models to make a profit on much lower sales than required in the '60s and early '70s. In other words, automakers could literally afford to indulge in performance cars, great news for leadfoots.

A final aspect was image. Muscle cars were as American as Old Glory, and even the new high-tech rides were unlike anything available from increasingly popular import brands. That was crucial. After years of blandness, Detroit needed an exciting "difference to sell," cars that would keep customers flocking in to help grow bottom-line sales and earnings. Though Big Three brands still cranked out "import fighters" with varying degrees of success, the muscle machines did far more to enhance their public reputations.