Ok ive heard several different things about the 89 harness and I just would like a clear answer before I buy a used one. My car is an early 89 5spd build in late 88. So is the plugs yellow or grey and is it interchangable with any other year model? Also since it is a 5spd, can I buy one that is for an auto? And last question is would it be possible just to buy a harness and ecu from another year model and put it in without major modification? Thanks for any help. Seems that my harness is totally messed up and I'm trying to get it running so I can sell it before I move.