2150 Carb on 1984 ford 250

I-m working on a 84 , 250 W/ automatic that has been run very little for the past several years. I took the carb off and had it rebuilt and installed a manual choke. It starts right up but does not want to idle. Other than the two adjustment screws on the front of the carb which are air adjustments I believe. Where is the idle adjustment screw.

check for vacuum leaks. There may be one around the gaskets. Also the plastic and rubber vacuum lines get brittle and crack.