Just a heads up, from my point of view, some of Classic Parts harnesses and wiring aren't compatible. I went through a lot of time with my 63 Chevy. Put the old harnesses back in and they worked fine. The tech guys there alway gave me some song and dance about a proper ground, or that I bought the wrong part, etc. but whenever I put the old harness back in it worked fine. Just my opinion based on my experience. Don't waste a ton of time scraping paint and trying to figure out grounds. If the old one worked the new one should in my opinion. Some of the harnesses worked and others didn't seem to.