I just picked up an obd2 h22a4 and i am swaping it in to my 94. i know i need the dizzy and injectors and an ecu, My question is will the p13 ecu swap directly in the car with no messing around. Will a chipped p28 bolt in with no other modds to the wiring go in. So can i use a p13 without changing wiring and/or a p28 without changing wiring.