The VR is a small white ceramic unit. I don't remember who built it. The voltage is almost exactly 5v.

The car is a 68 Dart. Access is pretty good and I believe that I have the room to do what I need to do there.

I had a buddy recommend diode #1N4001 which should drop the voltage .6 or .7 volt without too much heat.

I expect to have to experiment a little to get it where it needs to be, but I need a starting place.

Thanks for the advice.