I did a swap in an '83 t-bird, and the one thing I learned above all else, is for simplicity, get ALL the parts from the same source. Ford went and made a lot of changes year by year in the 80's, from different sensors to different harness connectors, etc. Your best bet would be to get everything you can from the same donor car, whether it's a Lincoln or a Mustang, or whatever, from the ECM all the way to the individual sensors, including the harness. Think of it as a matched set. Once you get it put back together and running smooth, then start to think about mods. If you start swapping in different parts before that, you'll likely never get it running quite right.
Of course, that's just my opinion.
