I don't think anyone here has "centered" the injectors. They've been using the "stock" split port injector location. The oval port "injector valley" is filled with JB Weld or similar.

-Chuck Dienzo Black 98.5 E1 SVT #5022 of 6535 Born on March 16, 1998 "If trees could scream, would we be so cavalier about cutting them down? We might, if they screamed all the time, for no good reason."