One of the effects of ethanol is that it tends to soften / dissolve the glue that holds plastic gas tank floats and carb floats together.
Moss is selling a brass replacement float for gas tank floats. There is also a Ford replacement float (P/N COAZ-9202-B) that is supposed to work. It may not fit every LBC but it will fit most.
If you're having problems with carb floats, there are now unsinkable floats available. Bob Johnson can probably help you out.