Carb issues

this is a very common problem with the fuels that we have these days. the fuels are not designed for carb usage! modern fuel injection always has pressure on it before the fuel reaches the engine so these probs are not an issue with the new cars. Oxygenated fuel, alchohol and winter blends all contribute to the fuel magically disappearing out of the fuel bowl of a carburetor. To deal with it, some kind of insulation on the fuel line, electric fuel pump, alchohol resistant rubber parts/neeld-seat, accel pump help the situation. Remember 10% alchohol means 5% less btu in the fuel, so you have less power also. If you can find some fuel without alchohol, that would be good also. If the carb has any bottom plugs (to plug factory drillings) these must be super "leak-free" also. (cant remember if a Holley has any of these or not) you can check these by applying high pressure air from a blow gun and with some soapy water on the back side, see if any air is passing through anything. If yes air is passing, even a small amount, fuel will seep out and evaporate. Drill and replace with some new fabbed plugs installed with marine tex epoxy. bottom of carb must be leak free. On a holley, the metering block and idle passage are what to check.