I am thinking of purchasing a bottom end with the following specs: Short bloc 302 Ford : crank durci,piston 0.30 mm over ,compétion cams hydraulique 292H 534 de lift. I'm new in the mustang world but I'm assuming stock gt40p heads will not be good enough for this set up. Can someone please help me, what do I need to do to my heads so I can throw them on this block. Thanks for your input