ive been without a fuel gauge for some time and recently installed a new fuel sending unit in my 55 6500, am i thinking correctly that the sending unit doesnt care wether the truck is 6 or 12 volt? mine had been converted to 12v. also i already knew that the original gauge was fried so i have what appears to be an aftermarket fuel gauge from the late 60's early 70's. when hooked up with about 3/4 tank of gas it reads past the full mark. i believe the sender is 30 ohm, am i correct in thinking that the gauge must match the sender ohm for ohm to be correct? and if so what is the correct way to test the gauge? the trucks a worker and im just wanting to get by for now.
