I swapped the thermostat and it runs at pretty much the same temperature - 190. I did test the thermostat on the stove with a thermometer and it does start to open around 160.
The funny thing is that the car runs cooler the faster you drive it! It pulls like a monster with those 3.08s from 35 to 100 mph. It pegs the factory 100 mph speedo in nothing flat...and the coolant temperature drops, the faster you go. At 100 mph the temp dropped to 170. (Allegedly, of course) ;-)
I think I need to swap out the 1975 100 mph speedometer for the rally gauge 160 speedometer. At least I wont worry about snapping the needle off.
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