Still stalling after carb rebuild. ???

That is the correct Port but fuel is not getting to that circuit for some reason, with mixture screw set throttle plates sould be just barely open at idle, and mixture screw should very idle speed from lean to rich.
I did just see a you tube from Mikes Carbs on the “Holley 1920 Idle Circuit” where he mentions an idle vent port in the main barrel? He tries to show it but doesn’t, he says it’s a brass colored port??