Hard to start when hot ??

We have a 360 in the Duster with an Edelbrock 700 ,starts fine when cold but once you shut it off ,its a b*tch to get started again,
When my son runs it down to the gas station to fill it up,he shuts it off gets gas and then trys to start it again ,no way. You have to take the air cleaner off and mess with the choke and then it will start.

Has any one had simular problems with their edelbrock and if so what did you do to fix it besides changing it to a Holley

Thanks, Bob / Bryce