305 and 350 1968 and later 73 and later for trucks 82 up for corvettes,all had the same bolt holes on the front of tge heads,the block and all had the same length waterpump. If things aren't fitting correctly you didn't use everything off the front of the 305 or you've assembled something wrong. It is literally a bolt for bolt swap. Your power steering pump is out too far,your trying to set it up on the wrong pulley grooves. Outer power steering groove goes around crank,water pump and AC. Back power steering pump groove belt goes around crank pulley and power steering pump only.