ok so been doing a bunch of things to my 65 sport fury. So my next step is making my fuel gauge work right. I am trying to figure out what size nut goes on the sending unit stud due to the fact that I have to put a regular wire connector on since the factory connector was broken off at some point before I owned the car. My next question is how do I ground the tank I used thin rubber to act as the insulator between tank and bottom of floor. I should also note the battery gauage does work but the fuel and temperature aren’t.