My friend and I recently purchased this civic for $500. It has a P75-ao2 ecu and a B20B engine. The wiring harness doesn't connect (OBD1 Harness vs OBD2 on the ecu.) Whats the best course of action to get the engine running? It has spark, compression, al that good stuff, just no ECU at the moment since this one wont plug in. Is there a correct ecu to use, or a way to use this one with this harness? Anything we should be aware of when using this set up?

Thank you!