Holley 1920 Idle Speed

Thanks. And how would I go about doing that? Buy a new Choke stove? I have a bimetal spring/coil that connects to the exhaust manifold then carb.

Also, for a 1970 I have a 195 degree thermostat in my car, should I change it to a 180? Maybe the fuel is percolating in the carb and stalling it out?