Sticking float valve

[29FordGuy]

Twice now my float valve has stuck open and when I turn on the gas it pours out the carborator intake. It is usually after sitting for awhile and no, I do not run the carborator dry when I park it. I did do that the first time it stuck so now do not. As I remember I have a pin seat float valve. Is the two ball gross jet style better and less prone to sticking? Thanks for help.