The engine is out of a 87 mustang, will a 94-95 ecu still work or do i need one from a different year. Also will it plug into the main wiring harness? or will i have to get a new one? The computer i have in the car now was made for a 3.8 v6. i wasn't sure if the harness for the 6 was compatible for the 8cyl. engine.. Any help would be great and much appreciated! thanks again.