The ground strap at the fuel sender wouldn't effect the function of the oil press or water temp gauges. If none of those 3 gauges work the limiter in the fuel gauge is the most likely culprit, providing it is all wired correctly.
Send me the fuel gauge, water temp gauge, and oil press. gauge. I can repair and recalibraate all 3 for 99.00 guarenteed for 1 year You wont build a custom panel for less.
