Greetings to all of the hot rod gurus out there! Once again I am in need of some assistance. I have a 1950 Merc with the stock Flathead V8 in it, the stock fuel pump, the stock air cleaner, and the stock side draft (I think you call it) carburetor. If I start and run the car every day it starts right up, however if it sits for two or more days I need to use starting fluid to get it back running. Now I'm no genius but I shouldnt have to do that. I took the gas tank out and cleaned it, the fuel pump screen is new and clean, gas is good, I ran carb cleaner through it and still have to do this if it sits for to many days. On a side note when it's been running and going down the road it will occasionally run rough like cutting in and out and when I go to gas it up there is quite a bit of pressure released when I take off the gas cap. Any type of help would be appreciated!