Hard time starting when engines warm???

[romes20]

Hi everyone, here is my problem. When cold starting the truck turns on perfectly fine but when I turn it off and say run into a store and come back out. I try turning it on and the engine turns over but has a problem actually firing up. Sometimes I have to try this a few times before firing. I've been trying to do some research and came up with "heat soak" or installing a heat sheild or phenolic spacer on the carb? Sorry I'm fairly new with all this so if someone could help me out that'd be great. It also replaced the battery about a month ago so thats brand new.

Thanks in advance,
Jared