Ditching a quick fuel carb.

Wow. Stop with the carb being bad talk until you get the other systems correct.

Loosen the distributor hold down and turn the housing counter-clockwise... how much does that cost. NOTHING!

If the engine picks up RPM, it wants the timing. Turn idle down and do it again.

If you don't know what the idle timing is, you are BLIND to tune the carb

I seriously doubt it's a carb issue at all. Borrow one that runs good on another car and see if you have the same problem. If you need to crank in a bunch of idle speed adjustment screw... it's not the carb!

Timing light and a vacuum gauge is about all you need to get this right. A xe284 cam? Minimum of 20* of initial timing, NO LESS! Might want as much as 24-26*