Used most of all the existing stock wiring at their respective termination points, lights, horn, fan, stock switches on the steering column, etc... and then used generic colored wire between, so I can track a circuit, point A to point B by color code using the stock wiring harness colors. But if something goes wrong I will be SOL to trace a fault from the middle of the new main looms. The V-8 conversion didn't make things easier. Wiring is a nightmare at best!