If you haven't done so, go to definitions on the first part of this obd1 forum and go to pcm 6395, $OE. Towards the bottom is 6 wiring diagrams. With that you have what you will need. You pretty well will use it all except gauges. You will need the drac, the check engine lite and the obd1 aldl port. For gauges you can just put in original senders for those. You will then be running the computer off the efi senders and gauges off old style senders. Ignition switch will just control a power relay. Of course there would be other ways to do it but this is pretty simple.