Ford Mustang Mach I
The original Mach I was introduced as an affordable performance version of the Mustang Sportsroof in 1969. It featured a long list of options and three engines. The base engine was the 302 V8, then the 351 V8. The top-of-the-line model was the mighty 428 Cobra Jet. Although Ford built over 20,000 Mach Is in 1969, only a small number had the Cobra Jet engine (via Hemmings).
Only 428 CJ-equipped Mach Is had true performance potential and could beat other muscle cars on the street. The 428 Cobra Jet’s output was 335 hp, but car fans knew it produced more than 400 hp.