Exactly! Nobody would have got away with anybody else's design in the late sixties, and Chevy didnt have a Hemi with the exception of a few Smokey Yunick 302's, and to make it a even grayer area, here is Mickey out in Cal doing his own thing yet tied to Chevrolet. I dont want to be the guy to tell a Boss 429 owner that he has a Chevy powerplant, or upper end anyway.
