I had to do that on the hot rod back in 2003. I had an ECU, a few plug housings, and a handful of connectors. It took me a full weekend using a gooseneck flatbed trailer as a work bench but I got it figured out. The hard part was sourcing enough different colored wires.

Like the others said, I wasn't afraid of chasing wire gremlins over the years.

We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon