71 Dart engine harness

Just took delivery of a 1971 Dart GT from California. Someone used epoxy to keep the firewall connectors from getting loose. This is an air conditioned car with a 318. Anybody got a good harness? It is the center plug that is the worst. The temp guage is not working so I started tracing the wires, and that is when I got this surprise. I am in central Fl zip 32725