Slant dies when cruising.....

Hey FABO!
I was going out for a cruise and here are the events.

topped off top half of tank before heading out. Admittedly 92 octane ....but from ARCO. At cruise it starts to fall on its face and I have to feather it to keep her lit. Shift to Neutral and floor it to clear it out and possibly see if the dizzy has moved...no backfire or hesitation. Somewhat of a limp home.

Next day, take her out armed with a fuel filter....starts the same symptoms after 5 miles. Jump out and change filter, starts right up but has similar symptoms now starting to fall on face off idle. Limp home. cut open filter....not too bad.

Next day, check carb for issues, find air filter totally oiled up and cracked vacume plug on carb down low on drivers side and the PCV is plugged into the top of the bowl which doesnt seem to have ANY vacume at all. Install clean air filter and new PCV connected to manifold vacume via the lower plate on carb. Also find loose ish bolt on carb plate. tighten.

Start.....symptoms persist as off idle stumble. tried to adjust idle circut screw.

I have a carb rebuild kit.
Have not checked for loose dizzy.
fuel pump?
accelerator pump?
clogged pickup?
seems like it is air/fuel situation.
waiting on carb brushes.
going to dis-assemble carb and soak in toxic bath if someone doesnt have a better idea.

thanks
wasnt sure if this should go under fuel carb heading or slant....so here I am.

thanks again.