What Engine harness is he using? I am unsure what you are speaking of. The ecu plugs are different because the ecu plugs in his car are obd0 the ecu is obd1 you should just go to my buddy’s website and buy an ecu jumper so you can run the ecu. His website is locashracing.com; he is an awesome and very knowledgeable guy. The part you are going to need is the obd0 to obd1 ecu jumper.

Good Luck!