if its a holley, take the side's off and check the floats and needles and seats. There may be some dirt or other crap in the needle and seat or the floats could be filled with water. My carb was just pissing fuel down the barrels and i got a 30 dollar rebuild kit and all i used from the kit was the needle and seats, and some basic gaskets. Its pretty easy, takes like 20 mins and can save you from having to rebuild the carb.
Andy