I've got a 1949 1/2-ton truck that I'll be re-wiring soon. I want to use modern, plastic coated wire, and upgrade to 12-volts, but otherwise keep the truck original. There are at least a dozen different wire harnesses on the market. Any suggestions on a qood quality, reasonable cost manufacturer for my application?? I want to make one minor change. The truck has a trailer hitch that I want to keep. I want to wire in a hook-up for trailer lights.