the machine shop will take care of the bottom end for ya.well the maching anyway. the rest is the same as anyother build.ive got a 383 in my 53 ranchwagon, and it is FAST.ive shut down a few on the street with this heavy car. suprise, suprise, suprise.!!! i love it. if you arent sure on how to build one just get ya a book read a little and spend alot! lol