Bret Ewing:
Your diagnosis sounds like my problem. Car is has always been "tricky to start and now will not start unless the carb is "dry" and I spray a little starting fluid in there. Then it starts, but if I let the rpm's too low, it will die, and will not start again (which is a problem I have not had before) until dried out and with a new squirt of starter fluid. The the whole cycle repeats itself.
It is an ERA 427 with a 351 and a 750 four barrell Holley.
OMathisen