318 Carbs?

My carb on a '65 Fury wagon 318, AT, won't idle and the accel pump stopped working smoothly just before it stopped idling. That was a year ago, car parked since then. I have another carb that was on the car until it started acting up several years ago, similar problem as best I recall. One is the original factory unit, the other is same model, rebuilt, from local parts house. Not sure which is which now. I suspect gumming from gasohol. Can I clean out the passages in these by soaking or vatting them? I want to try cleaning them out internally first, before having to take them apart. The older unit had a kit installed years ago. Neither has enough mileage or wear to need a kit, or replacing. Gas tank was cleaned out good, patched with copper & solder, and red coated inside 20 years ago. I've tried fuel tank additives on these and other old cars in the past, without decent results. I still have the shop manual from when the car was new. Thanks for your help. LS