[kev2809]

Originally Posted by HO455

Judging from the gauge being around the "C" mark and then reading just below HOT when the truck isn't running hot I would say there is an issue with the guage.
When you said you used a stock sender was it a stock sender for the truck as opposed to stock for the engine. The guage requires a specific sender to be accurate.

These threads may help you.

http://67-72chevytrucks.com/vboard/s...d.php?t=587190

http://67-72chevytrucks.com/vboard/s...d.php?t=726700

followed one of them links and they posted a temp sender part number. i tried that one and it seems i had the wrong one (rock auto ) warmed it up today and this is where the needled sat, with a cheap thermo gun pointed at the pump it read about 190 ish

thank you!