We are currently rebuilding my 2nd Gen Rx7 that I wrecked last year and putting everything in a new car. The problem is my wiring harness wont fit the injectors from the old car. on the wiring harness in the new car it is a 88 and the piece that snaps in goes on the side. On all the injectors that I have the piece that snaps in is on the center of the injector. Do I need to replace the whole wiring harness or can I just file down the part on the injector? The engine is a 89.