19. Ford Mustang Mach I
The original Mach I debuted as an affordable performance version of the Mustang Sportsroof in 1969. It featured a long list of options and three engines. The base was the 302 V8, then the 351 V8 and the top-of-the-line model with the mighty 428 Cobra Jet. Despite the fact that Ford built over 20,000 examples in 1969, only a small number had the Cobra Jet engine (via Mecum).
But this was the definitive option to have. Only 428 CJ-equipped Mach Is had true performance potential and could beat other muscle cars on the street. The 428 Cobra Jet was rated at 335 HP but everybody knew that it produced more than 400 HP.