Your buddy has the same heads?
Got to watch what your "buddys" say they have. I know a guy who built the identical motor his cousin has, 350 twin turbo and all the parts are supposily identical, only differnece is one runs 8sec in 1/4 and the other runs 9.8 in 1/4. He aint gonna tell you exactly what he has, then the race would be too close!