Hello! I've been creeping around the forums for years and finally made an account. I have a '68 C60 farm truck with a 366 in it. The temp gauge never worked when I got the truck, but if you touch the sending unit wire to ground it pegs hot, so I know the gauge works. Being a C60 I couldn't find a sending unit listed for it anywhere. Working with my local NAPA guy we found a sending unit out of a 68 2500 396 truck that looks identical, but after installing it today the gauge still never gets off cold. Does anybody know what the resistance cold/hot should be for this truck's sending unit? Anybody know of where to get the right one? Any other ideas?
This is the sending unit I have now:
https://www.napaonline.com/en/p/ECHTS6469
~EDIT the old sending unit says "AC-Made In U.S.A.-12 VOLT" but I don't see any part numbers on it.
Thanks!