I'm getting ready to put a old KB top fuel crank with Mopar rod journal sizes on it into a new World cast iron hemi block with Manley steel SS Hemi rods, I'm sure I will have to grind on the block to make clearances on the oil pump boss and maybe the bottom of the cylinder skirts below the cam shruggy
I've done one other old top fuel 4.5 crank with steel rods in another, probably, a early Mega hemi block, and the cam was not even close up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)