225 stalling

The 225 slant in my 62 valiant started stalling at idle without warning. Fuel pump, tank, and all ignition components are within 1000 miles new including rebuilt carb. Ran great last night but today will stall at idle unless I feather the gas pedal. All plugs look good and dry compression test is 110 to 115 psi on all cylinders. Tried tuning carb with no luck. Engine starts right up but immediately stalls unless you work the gas pedal. I removed the fuel supply fit tong from the carb and found the small I ring was deformed but also in the process the metering valve disappeared so I'm can't go much furtber until I get the carb right. Just looking for more direction as I move forward