Instrument cluster voltage regulator

So, WHERE IS the instrument cluster voltage regulator on a 64 Valiant? I JUST HAD the cluster out tonight replacing bulbs and cleaning it up. Not only is there no regulator in the cluster, but no place for it either.

I ask because I am getting a full tank of gas with only about 1/8 tank and the temp gauge goes all the way over to the H side like both are getting full voltage. This is with the car not running, so I know it is not over heating. Is the regulator in a different location other than plugged into the cluster?

Thank you drive through.