I've been searching the past few days for info on fa20dit interchangeability with the old ej platform. I'm guessing the fa and ej platforms can't be used for a hybrid setup like we did with the ej205 heads and ej25 short block. Can anyone point me to post where people have looked using fa20dit heads on an ej25 short block? Or... Any threads about bolting the STi 6speed to an fa20 short block? The previous wisdom was any ej trans would bolt to any ej short block.... So I'm wondering if the fa bell housing bolt pattern is now different.