Carb recommendation

OK, so just to be clear, i can order a Square Bore Edelbrock or Holley Carb that will bolt right up to my existing 340 Intake that has smaller primaries?
Be very careful here. I have the 69 stock intake on my 340, and the intake bores are smaller than a standard Holley. Measure before ordering. As has been said, if it runs well other than the fuel boiling issue, there's not much point in changing the carb, unless you're looking for more power. Then, I would still follow YR's advice, and upgrade the intake while you're in there.