Muscle Car History - The Story Behind America's Muscle Cars
Although the muscle car era was short-lived, it still defined a generation in America, and has given us possibly some of the most collectible cars in all of automotive history today. With the sharp lines, wide profiles, muscular looks, and chrome, these cars looked mean. Team the mid-sized bodied frame with a monster V8 engine, and these cars WERE mean. Mean fast! Some models that fit into the muscle car category are the Buick GS, Pontiac GTO and the Dodge Charger.
Unfortunately, as soon as the muscle car craze started, many factors came about that foretold the imminent doom of this short-lived machine. This is it’s story...
Muscle Car Definition
The definition of a muscle car is a mid-size model car, with V8 engines, generally produced between 1965 and 1973. Most muscle cars were current mid-size models being produced by car manufacturers, and they added a large V8 engine, special trim, and usually better handling and performance options like suspension, braking, etc. A good example of this is the 1970 Chevrolet Chevelle. This model was designed as a mid-size family vehicle and the base model was powered by a lonely ‘ol 4 cylinder engine, or you could team it up with the biggest muscle car engine of it’s time, the 454.
The muscle car era coincided with the first baby boom generation. With the end of World War II, soldiers came home and there were babies everywhere! Cars during WWII and after, were pretty conservative in their styling and speed. Chop Shops and performance shops sprung up after the war, and the hot rod was born. The problem with this was it cost a lot of money, and took a lot of work to modify a car. It was not economical for most.
This is what made the muscle car successful with the new baby boomers – price. Factory performance was a lot cheaper, but the current models lacked power and speed. That all changed in 1964 with the Pontiac Tempest. The GTO package on this model added a 389 V8 engine, along with a floor-shifted transmission, special trim and GTO badges. GM Corporate policy at this time did not allow anything other than a full size model to have anything larger than a 330 cid engine. The engineers at Pontiac worked around this by offering the 389 cid engine as an option, instead of creating a new model for it. Pontiac planned on selling 5,000 GTO’s that first year; 32,450 were eventually sold that first year, starting the American muscle car race.
The Mustang debuted in 1965, and within it’s 2 first years sold nearly 1.5 million models. In specific technical terms, the Mustang is considered a pony car. A pony car is a small bodied vehicle, with large sized engines. It’s hard to argue that a Boss 409 couldn’t compete with a muscle car, so they are generally lumped together in the same category.
Each year, muscle cars kept on getting bigger and heavier, due to added options. This lead to a new breed of stripped-down muscle cars, such as the Plymouth Road Runner and Dodge Super Bee. These were designed to have a lower cost than the other models, without the extra options and plush interior. They were designed to be cheap and fast, and you could go race on the same day you bought the car without any modifications – and probably win!
The Fun Is Over
As soon as the muscle car craze got to full speed, it slipped a gear and never recovered. The three main speed bumps were insurance premiums, tougher environmental laws, and the 1973 OPEC oil embargo.
Safety lobbying groups started to raise concerns about stuffing such large engines in such small cars, and marketing them towards the younger generation. Ralph Nader and his lobbying group was already pointing out the inadequate handling, braking, and other safety issues with the base models. The tires performance on these models was also suspect. Adding a few hundred more horse power to these models was not going to make things better. Insurance companies eyes were opened up to these issues, and started adding large surcharges to high-powered cars. This quickly pushed many muscle car models out of a young buyer’s price range - the same group that were buying most of these cars.
Congress started taking a harder stance on emission controls, and the automakers had to shift their priorities from creating more horsepower to cleaner emissions. Leaded gasoline was banned in 1973, and the auto manufacturers needed a few years to build up to this, so the engines were starting to be tuned down by 1971. The horsepower dropped with the use of unleaded gasoline, since the compression ratios had to be lowered on the engines. The higher the compression ratio, the more additives are needed to lower the chances of premature ignition. Up to this point, lead was the main additive used, but it is not good for the environment, obviously.
Another thing that happened in 1971, although it didn’t physically change the output of the cars horsepower, was that the manufacturers were required to post the actual power ratings of their models, not just the engine ratings. Prior to this, horsepower was generally overrated. Overall horsepower was rated by the engine output, not the output at the wheels. Once you include the weight of the car, the transmission and gears, belts, etc. the raw power of an engine will drop drastically. Again, this didn’t change the actual horsepower, but the numbers started looking lower overall for the muscle cars, and technically any car after 1971.
The final nail in the coffin to the muscle car era was the 1973 OPEC oil embargo. Oil imports into the US and other parts of the world from OPEC oil producers fell around 25% - 30% in late 1973 to mid 1974. Gasoline became so scarce during this time, that long lines formed at gas stations, where gas could be found. Many fuel stations were empty. To lessen the chaos, license plates ending in odd numbers were only allowed to purchase gas on odd numbered days, and vice versa for even numbered license plates and even numbered days. Detroit could not sell a new car that had such low miles per gallon, and the muscle car era was over. The last true high powered muscle car could be the 1973-1974 Pontiac Trans AM SD455.
More Muscle Facts...
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
"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."
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."
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.
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.
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.
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.
