Had the head off tonight, it hasn't been skimmed or done properly. don't know whether to get it skimmed and re-fitted. The worrying thing is the pistons are calibra ones that have been skimmed. Do i get it honned and rebuild it or do i get new uprated rods and pistons. If so which ones and what can the zetec crank handle as i want a reliable 300+ bhp engine.