When I drive my 63, whether its warm or cold outside, and I turn the car off. 10 minutes later it's like the car has been sitting for months. Carburetor seems to be dry. Have to turn it over a bit and pump the pedal several times to get it to start. It's always been like this. I put a 1" phenolic spacer under the carburetor and it helped a little but still annoying. Couple days ago when I turned it off it dieseled first time ever. Temp seems fine. Usually 180-190 depending on the outside air temperature. Is the gas is boiling out of the carb for some reason?