51 Ashton,
I see the part on Jim Carter. I think there actually is one already in the truck being used with the existing gauge. I'll have to take it out and see how it fits with the new one, and if it fits in the head.
Good advice on doing a controlled test with the 'stat and new gauge - thanks for that one!
Greg


1949 GMC FC253 - 1 Ton Dually
1966 Buick Wildcat Convertible