You guys always kill me with your some of the troubleshooting ideas...but don't stop trying
What is the under-hood temperature at the base of the carburetor with the hood closed after driving the car and all is at temperature??
You would be surprised.....
How hot does it get at the base of the carb after a heat soak?
I have to think it's hot hot under there, just because the temp gage says normal means nothing till the temps are checked.
Proper running engines do not require band aids