Originally Posted by sunsetdart
If the gas gauge is the exact one for the sending unit in the vehicle, then it should be properly calibrated for the gauge. Most sending units operate on OHMs and every make has a different OHM reading for the gauges.
The best advice I can give you is to install a ground block. Ground the block to the frame and then run all your rounds to that block.
No its a mix and match of units, I do have the ground handled though, thanks