Motor mount setup (which allows you to bolt up a v8 to slant 6 k frame) or buy a v8 k frame (73+ spool type is the best), v8 tranny either auto (904 or 727) or manual (833 non-overdrive the way to go) and depending on the power output of the motor a stronger rearend, either a 8.25 or 8.75 or...