[saltshaker]

I Went thru this...I couldn't shut down a barrel by turning the mixture screw all the way in, so i took the tops off all the carbs removed the squirter and float. I pulled the idle jet stack out and got a can of carb cleaner and with a long straw that fit in the spray head i up it in the passage that feeds the idle circuit... There is one on each side of the fuel bowl opposite side of the exhaust jet. Squirt the cleaner in there till it starts to come up where the idle jet screws in.... Blow air back down it to finish clearing the passage. I would do all 4 carbs. To get the idle circuit working correctly I took out the main jet stack so the idle circuit would work on it's own..... The start to work on the main circuit.
My 428 was 435 ci w/ a cam 236@.50
My combo worked good for me
65/120 idle
160/175 main
F11 emulsion tubes
7/8 turns out.....
Good Luck, Jon