Dave, I know there is nothing worse than other people telling you what you should do with your car, so please take this in the spirit it's meant; A4 is such an unusual color on these era cars and looks beautiful when fresh. You intend to swap in a Hemi, fair enough, it's just bolts anyway. But although you are doing your car FOR YOU, you know for a fact other people are going to see your car and say "WOW! is it a real Hemi car? And then; "Is it a real Black car?" Saying "No" all the time is going to get old pretty quickly. Unless you just like winding people up in which case tell me and them to go to hell... As I said before, it'll look great anyway, good luck! A4 Silver will be special.