I had the head on a 01' 426 port and polished. The carb is stock, no mods or add on's, and fmf power bomb head pipe w/turbin core end. What would be a good starting point for jettting. Ive lookd through a lot of posts cant find much other than jet kit recomendation. I have a zip ty fuel screw and boysen pump cover i will try after i get jet hurdel cleared.