Voltage regulator dart rallye cluster?

First of all, thanks for your service, 65 Dartman. I too was in the Air Force for 20 years. The IVR is, indeed, inside the gas gauge, and I would not recommend trying to fix it yourself unless you are very sharp with electronics and gauge repair. LOL, I clicked on the link in 66 fyssh’s post and the article was written by ME (Mike Harrison). In 2000, I contacted Mopar Muscle and suggested they write an article on Mopar electric systems since I had just restored my 69 340 Cuda and had to trace multiple wiring problems. The Editor (Geoff Stunkard at the time) asked me if I could write one. I wrote a rather long one with pictures. They stretched it out over 3 issues and paid me very well for it. Anyway, The IVR in the gas gauge does feed power to the gas gauge, oil pressure gauge and temp gauge.