Holley Flooding Engine and Spewing Gas
He stated he checked that with a electric fuel pump...Id suggest you take a look at the idle transfer slots under the butterflys and make sure they are perfect squares, and that the secondary is not propped open by the little hidden screw to make up for a tall cams idle. Are the cold pipes matching the dual plane of the intake? then you got an idle issue with one side of the carb. probably just a metering block passage clogged with a piece of gasket. Use fine wires to probe those. Also check your power valve for a leak, common.