Part of the reason it's slow going is this. 86 F150 a young man who works for me owns. First gen EFI, it runs like crap. Too many amateurs screwing with it. Broken and loose connectors, missing sensors, cut and spliced wires all over the damn place. An absolute mess. Plus the parts are hard to find and expensive. I told him the best thing to do at this point is put a carburetor on it, and throw the EFI in a dumpster.
We are in the process of converting that whole mess to a 4 barrel carburetor and regular electronic ignition. The farther we go into this truck, the worse it gets. I liken it to peeling a rotten onion. When you think the layer you uncovered is the end, it just gets worse. Too many amateur (wiring engineers) got ahold of it before I did. Now I am unFucking the whole mess.
The only thing that worked was the headlights. So it's not just the EFI I'm helping him remove, I'm getting the rest of the wiring to work as well. I'm enjoying correcting it, but I think this along with the 69 cuda are the 2 worst unFucking messes I have taken on.