Still has a stumble/hesitiation

750 Mighty Demon on my 340 with 3.55 gear and a 3000rpm stall and heres the issue.

Pullng about 9" of vacuum in gear warmed up so I swapped to a 4.5 power valve 65 Jets in the front 75 in the rear this was checked on an exhaust gas analyzer while driving.

31 shooters front and rear and red pump cams. WOT of the line from idle the car if warm while pick up slowly not a full on bog and its trying to squak the tires but not much else.

Cruiseing around 2000rpm with quarter throttle tip in the engine will pick up rpm and fall back down then pick up and go again you can even watch it on the tach when it does this.

I've tried up to a 35 shooter with no change and when running the 6.5 power valve it was also no different.

I've tried resetting the idle speed screws but is it possible I have exposed the transfer slots too much still? Starting to feel really lost and eyeing a 3310 Holley new in the box for sale locally.