The past couple of days I've been looking into that a bit. It seems that the Ford 302 or the Chevy small block would be the best bet with preference to the Chevy due to the fact that there is more of everything out there for it to make it "fit." I have a '71 coupe that is in rough shape that I'm thinking of doing the same thing to. If someone has anymore info on this we would appreciate a little insight.