If you want to roach a gas gauge quick like, put the hot lead on the wrong post. 12 volts probably will roach it faster than six volts.
I have 3 ADs on 12 volts with original gauges and 30 OHM sending units. They all work just fine. I thought that I had a problem with the first one that I converted to 12 volts and put in a Runtz and it did not do a thing. The problem turned out to be a combination of the float arm bent at the wrong angle making it hit the side of the tank and not bent right to go deep enough into the tank.
Bent it twice and work fine, last long time.
Carl


1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission