I think I have found the source of all my carb. problems, with the Edlebrock and stock carb. the stock filter tower thingy inside the tank has turned into a crusty, flaky mess. the filter material is crunchy and most of it is missing, and most likely passed through my engine, and there is hard green salt looking stuff filling up most of the the filter tube and the inside of the valve body. the main gasket that the handle slides on and seals between Off, on and res. looks like black rubber but its hard and crusty around the openings too. If you have been plagued with sticking float valves like me, you might wanna check your fuel filter too.