Later model engines with electric sending units. have a 1/2" tapered pipe thread for the temp sending unit, and there is an adapter available for the older engines with a 5/8" straitght thread and the capillary tube type of temp gauge. Is your gauge electric, or direct-reading?
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
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