will not sell 302 heads, theyve been professionally done with bigger valves, just playing around, not too concerned with et at this time, i spent 600 on a bullet custom grind, what a joke. the sd is already port matched to heads and does surprisingly well, air gap produced the most power with the 284/484 i had though. ihave a set of 308s that will hit the shop this winter. also have access to rebuilt xheads for 1000,not sure though, thanks for the input