Zig needs to get his gas gauge working. They are stock (1950?) GMC gauges, which means they were designed to work on 6 volt positive ground juice. The truck is now 12 volt negative ground. I'll need to do some investigating to find out how to get the positive ground gauge working in a negative ground system. Just a thought: Isn't the Chevy of the same year 6V negative ground? Maybe we could use a Chevy gas gauge? Is it the same color as the GMC gauge? There is some type of "reducer" attached to the voltage stud on the gauge. Zig: Is it a "Runtz"?