[Roadtrip]

I think the wiring harnass would have to have a lot of damage (like a short-initiated fire) before I'd replace it with a univeral harnass. The wires are probably fine, but quite a few of the connectors may have corroded beyond repair or lost their grip. Just replace any questionable connectors and solder them on. A visual inspection for rubs and cuts would probably suffice. Also replacing individual wires that are heat damaged is relatively easy.

Alfa electrical systems are pretty simple anyway. If you're doing a complete body tear-down, I would think it would be pretty easy (but time consuming) to just lay out the old harnass on the floor and duplicate a new one with bulk wire.

I'll be 95% of even old wire harnasses are basically sound. Just replacing connectors as needed and taking CRC spray and a dremel tool wire brush to shiny them up is all they need.