I'm converting an 86 Cougar 5.0 efi harness to mass air to install into my 86 merc marquis with 5.0 / T5 swap. I have the 86 O2 harness and only uses 6 pins. One of which grounds to both sides of exhaust manifold and pin 40. Will I be able to use this, or make my own harness with the O2 harness extensions. Thanks for your help!
Mike