carb engine to efi

i know that the blocks are the same between a20a1 and a20a3 but i am wondering about the head... i think the only diff is the distributor mounting.. the carb head has two bolt and the efi has three. can u put the efi one on the carb head using only the 2 bolts and be ok? any help would be appreciated :dunno:

You might want to PM Catalin on this one, he just converted his to EFI, as well as bolting on the EFI unit I think he said he had to get a new ECU, a new wiring harness and gas tank.