Just bought a harness from Brattons, which has been recommended here many times. I think, because of the correctness of the bullet ends on the wires for the headlamps. I have also seen the harnesses from Sacramento Vintage Ford beeing recommended reportedly because of the quality/heavy wire gauge used. However, when I called them up, the guy on the phone couldn't tell me anything about whether or how their wiring harness differed from that of others, so I ended up not buying from them. The harness from Brattons probably works fine, but unfortunately they have made the switch end incorrectly using modern style cable lugs and terminals, so I ended up with cutting off all wires at the switch end and dig out an original switch and resolder the wires to the original switch. I would expect however that this is the same for all vendors, but hope that someone could prove me wrong