www.ClassicCarWiring.com has a color coded wring map. A couple of the wires have been off, but over all worth the $20. My original was worse then first thought. Many wire were cut, or melted. I have since redone a complete fuse box out of another year ($25), and matched it to 72' with the help of the old wiring harness, and the color map. Now everything will be ran through the junction box and not the firewall holes, except the A/C wires that do not go through the junction.