![]() The most extreme example was the Mustang fastback. ![]() The unhappy result was that the Mustang and Cougar looked even more ponderous than they actually were. The F-body stood in stark contrast to Ford’s pony cars, which had slab sides, heavy creases and kammback rear ends. This was achieved with curvaceous fender shapes, a tapered fastback roofline and a lithe rear end. General Motors’ designers deserve credit for visually minimizing the F-body’s bigger size. 1970 Pontiac Firebird ( Old Car Brochures) These included exceptionally long doors, which eliminated quarter windows between the B- and C-pillars. In addition, the so-called F-body the Firebird shared with the Chevrolet Camaro was also weighed down by new features. Like the rest of the pony cars, the Firebird got heavier partly because it grew in length and width. Firebird well tailored to visually minimize extra girth ![]() That was heavier than a Dodge Challenger R/T (by 80 pounds), Mercury Cougar XR-7 (by 260 pounds) and AMC Javelin AMX (by 330 pounds). The top-end Firebird Trans Am V8 weighed even more: 3,575 pounds. The above table only shows weights for six-cylinder models. Even so, it was still a good 260 pounds lighter than the Firebird, whose redesigned body was introduced in the middle of the 1970 model year ( Wikipedia, 2021b). The 1971 Mustang added 300 pounds from a comparably equipped 1967 model. Model for model, the second-generation Firebird became the heaviest pony car. The Pontiac Firebird was one of the biggest offenders. ![]() All of the pony cars bloated out when they were redesigned in the early-70s. The 1971-73 Ford Mustang has been criticized for growing too big and fat (e.g., Mueller, 2010). ![]()
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