I had a friend that bought a new 1966 chevy 2 w/ a 365 horse 327-4 speed-posi trac, no power anything, or air. there weren`t "any" tires that would come close to holding that thing. there is no way any stock 340 would have out run that car. I`ve been around a few 340`s, had a 330 horse barracuda that would out run 340`s back then. gotta disagree on this one . that 327 would anialate a 67 375 horse gtx too. matter of fact, the car was never out run back then.