I just started my EFI project and I've already screwed up. I thought I read on the board that a 302 upper plenum would fit on a 351 lower. I've got a E8TE (truck) 351 lower and picked up a upper plenum off an 86 Lincoln which looks like a H.O. plenum with the throttle body on the pass. side. but it does'nt fit the lower. Other than aftermarket parts or using a truck upper, what are my choices?