The stock wiring loom was in such bad shape when I took everything apart, burnt wires, spliced wires etc.... it all had to be replaced, instead of buying a replacement I just rebuilt completely. The Pamco unit comes with its own leads from the E-Advancer which I installed back by the battery. The original wires to the points system were removed from the loom as they were no longer needed and I did not want "extra" wires sticking out of my harness. I could just run the two new wires from the points in a separate jacket but along side the main wiring harness. Just not very clean.