What Carb for Poly Stroker

Bewy said

Observation: the pump arm is in the 2nd hole to give more pump shot. In all the years of using these carbs, I have always been able to use the outer hole which gives less pump shot & better mileage.

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Do you mean the top hole?

Also what's this hole? Do I need to plug.it?

Finally the choke. I bought the manual choke version because I don't need it where I live. Should I wire this one open or remove the flap altogether?