I used the Ron Francis Telorvek system when installing my 1992 Thunderbird 5.0 (same as the SN95, 94-95 Mustang engines, but forged pistons) in my 87 Ranger. I used a Foxbody A9P computer and MAF. I can't recommend that harness enough. Awesome quality stuff. Each wire is printed with writing describing what it's for. The wire lengths are so long, you can run the harness anywhere you desire and still have 10-15ft of wire left over. It's one of the more expensive options, but in my opinion, it's WELL WORTH THE EXTRA CASH.
The only thing I wish I did differently, is I should have bought one or two 40 pin Delphi connectors to make the harness easy to separate should I ever need to pull the engine quickly. Something like this:
This is with the harness already ran in to the cab, and the computer placed where I wanted it. The wires are that long!
This shows where I mounted the entire system: A9P EEC, fuel pump relay and inertia switch, and Telorvek panel. I made a custom steel bracket to hold the computer to my aluminum mounting bracket:
This harness is looooong!