You're idling on the power circuit. You've totally exposed the transfer slot. That's why the mix screws have no effect. You need to get the throttle closed to fix that. You'll need to increase your initial timing (idle speeds up) and then turn down the idle on the carb
You'll likely also need a fuel regulator set at 5 psi.
There's some info here on transfer slots.
http://www.crankshaftcoalition.com/w...EI_distributor