318 Idle Problem

is this a new set up ???? or some thing that has just started hapening??? what type of fuel pump do you have ?? stock mechanical or electric ?? with out seeing it,,hard to figure out,,sounds like you either have to much fuel pressure or dirt in the carb,,,have you messed around with the metering rods ?? get an edelbrock carb book or google edelbrock problems,,,, todays gas has to much junk it in,,if you have a metal tank,,,and dotn dry the car regulary,,,the water in the gas falls to the bottom of the tank,,,,making rust,, it wil end up in the bottom of your eddy carb,,,,ask me how i know ???? just went thur mine,, was having issues almost liek yours,,,, took the carb apart,, clened it good with carb cleaner,, tooth brush,,, blew it out,, the removed the jets, tooth brushed them,,, blew carb cleaner in to all the ports and in the idel mixture screw holes til it came out,, put itr back together alll is well,,,,now looking for a poly fuel tank,,,