1970: Everyone had a part in it. Think about it. Ford, Chevy, Dodge, Plymouth, American motors. Buick, Olds(442),Chrysler’s, Ford alone was crazy! Mustangs: GT 350 and 500. Boss 302,429, Mach 1, engines 302(several stages) 351 winsor and clevelands( several stages). 390s, 428s , boss 429, crazy! My favorite year!!!!!!