is there enough meat in the chamber of a 88220 2tg head to fit the bigger valves out of the rest of the 2tg/3tg heads? reason for asking is i have an 88220 head lying round and didnt really want to spend the money for another head for my 3tgte... has anyone actually compared the flows with bigger valves into these heads as compared to a later efi head?
CelicaRA45 has flowbench figures for various 2T-G heads before/after porting, these were posted recently. Search you might find them or give him a PM maybe.