When the gas tank on my 64 is full the gauge reads between 1/2 to 3/4. I read on a Ford website that when the tank is full the sending unit puts out a certain amount of ohms and when empty the ohms are different. I will admit I don't have a clue what or how to check that.

Then, is there a way to adjust the internal float or whatever, to fix the problem? Or, is it a problem with my sending unit not putting out the correct ohms? Wrong type sending unit?

Badbird AKA Larry