Is your electrical system 6V or 12V? If you're running a 6V system there is no Chevy sending unit that I'm aware of that will have the right resistance. Try one calibrated for a pre-1955 MOPAR or Ford cooling system with a 6V electric system.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!