Okay, that is making sense in my head. If the VR isn't seeing the true battery voltage, and is seeing something lower than the actual battery voltage it would try to overcharge the battery. Do i have that right?
I like the idea of a relay running everything at full power and may well revisit that idea in the future. This car is destined to get an efi 360 magnum which will require a new wiring harness under the hood. I also kept the power distribution box from the donor truck which has lots of relays available for whatever. But that is getting off topic!