The American Autowire harness is not compatible with factory AC (due to fuse box placement/relocation) and the others I've seen are not complete or easy to install compared to the American Autowire harness. What is the best harnes for a 67 mustang with factory AC? Thanks!
I like OEM style harnesses, then it still matches the wire diagram and other people can help you if you run into trouble. Alloy Metal Products are OEM drop-in replacements, and can be found at National Parts Depot. Its best to give them a call, because harnesses vary with options, engines, etc.