If you are starting totally from scratch and don't have a lot of factory accessories, the Painless wiring would work fine. If you are using factory gauges, ignition switch, headlights, wipers etc, the repro harness for your car would be a better choice because it has all of the right connectors on it and the fuse block fits in the firewall where the original was. The factory harness has all of the coverings where they are supposed to be and the wires are all the correct length. I don't know if your 65 has the flat wire harness that runs to the rear to power the tail lights and such, but I don't think that part of the harness is reproduced and you will have to use the old one.