When I purchased the car and went through it get it running, I cleaned the carb heat thermostat and got it working. Since then, I have completely forgotten about it. Incidentally, it is usually the rear carb that acts up. I will look into bypassing the carb heat and see if things are improved.
Yesterday, I pulled the tach signal from my electric pump controller (this way, it still primes on key on, but does not run while engine is running) and relied on my mechanical pump. I drove the car 200 miles without the flooding issue. But, I was not struck in traffic. Outside temp was 80 degrees. I was reminded that the engine misses under heavy acceleration when running on mechanical pump only. When electric pump is on, no missing. So, it seems I need something in between.