Work was performed this weekend. Old voltage regulator is out, a new RTE IVR3 limiter went in. NOS speedometer went in, cable lubricated. The results: the speedometer works like a charm. The fuel gauge now reads slightly over 1/8th tank when fully topped off and drops fast. Everything else can't be bothered. And that's with the two odd wires both hooked up and not. All that seems to happen is if I unhook the red wire from the column, my seat belt buzzer quits working. I do wonder if the sending unit in the tank is moving properly, but as far as everything else?