318 Engine stumble

First thing to note ......ive been working on the list you provided until it got dark.
I rechecked the transfer slots and the accelerator pump. The are small squares and the accelerator pump is well adjusted.
The pumps are spraying fuel.....I can’t say the pump cam is the right one right now. The pcv is hooked to the intake manifold into a t line going to the booster.
I will put it back into the carburetor and run a new hose to the booster from the manifold. Right now it is capped off at the intake.

I also put some smoke in the intake with the carb blocked off on the top.

Smoke came out of the choke area. I took the choke off and saw a small round gasket in between the choke housing and the carburetor.
I don’t know why smoke was coming out of the choke area or if it is supposed to do that. I decided the gasket needs to be replaced as it was very thin.
There is some sort of piston in the choke housing. I’m not sure what it does yet. It slides loosely in a cylinder

So the choke is off. And that little port is exposed. I then turned out the idle screws to 2. Car idles fine again and is movable.

The off idle stumble is still there.

I will put the choke back on and start over with the mixture screws. I’m hoping this was the cause of some problems.

The reason I turned out the screws all the way was because I wanted to see if it was too much air or lack of gas. When I have time again I will go through the list and see where that takes this.