Proper Thermosts temp for 318

Thanks for all the responses.
Sounds like I should go to at least 180.
Although the summers are hot and long here in Okieland!
But the great aftermarket rad should handle it fine.

Lived in Duluth, Minn, my first assignment in the Air Force.
Cardboard wasn't even enough there.
I had a power line across the alley to where we parked the car, hooked up to a tank heater on our 1970 Dart.
Most of the winter, all I could see was the top of the pole I ran the wire to.
NEVER MORE! :(