The Pontiac Trans Am 455 Super Duty arrived just as Detroit was being forced to turn down the volume on big cubic inches, which is exactly why it still looms so large in muscle car history. Built in ...

Last year, a 1974 Trans Am, powered by its original Super Duty 455, and four-speed manual, changed hands at auction for a lofty $134,400. It was no run-of-the-mill used car, of course: two owners; ...

Firebird sales increased in 1974, and the Trans Am more than doubled from the previous year. Pontiac sold over 73,700 units this year, and the base Firebird accounted for over 26,000 cars, remaining ...