The only MAJOR difference is the engine, 95% of everything else is interchangeable with the GT
The Cobra has alot of differences but the GT and the mach 1 is very similer.
the mach 1 is closer to the GT then the GT is to the 6cyl, the 6 cyl uses a different engine,tranny, and im not positive if it comes with the 8.8 or not. obviously yea the suspention varys between models...
but really Mach 1 has a hole in the hood, a different motor, more power,move valves.. and thats about it, stiffer springs to probably.