You should be able to get the thermostat at any auto parts store. Be sure to have the numbers off your carb before you go in. You may have to get the linkage pieces off a junkyard truck though. Good luck!
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Lucas
drop_shift@hotmail.com
My Daily-Driver: '72 Chevy LWB Custom/10. Rebuilt 350, 300 HP thanks to a few go-fast goodies. Ochre with a white top. Future plans include a frame off restoration, and maybe a blown 383.