Since 1969 was a very horsepower-dense year at Dearborn (the Mach 1 and the Boss Bros were breathing ... season with Henry II’s empire. 470 were GT500, packing the 428 Cobra Jet big-block ...

So the Mustang Mach 1 isn’t worth the premium over the regular ... and to work with the GT500’s rear diffuser that contributes to the 22 percent increase in downforce. There’s also a bespoke ...