Tad hard to start......pretty sure fuel issue

Sounds like maybe you gas is boiling.I had this same problem on a 383 Fury.Cold easy start,let it sit 3 hours easy start,shut it off and start it right back up easy start,let it sit 10-60 minutes and very hard to start.Run it let it sit a few minutes and put your ear up to the carb if the gas is boiling you will hear it.I made sure my gas lines were away from everything hot,and put a spacer under the car,this fixed it.