Holley/Demon Carb stumble

Here is why i don't think adding any more squirter is going to help anything.
Last year i had the exact same combo. EXCEPT i didn't have my 4200 stall. It was only a 2800 stall.
2800 stall SHOULD have required a bigger squirter then the 4200 stall.....Right?
2800 stall was happy with a 31 squirter and the 4200 stall needs 37's.??????
also when i first install the 4200 stall converter, there was no stumble, no need to add more squirter.

My mind goes to the power valve. But if it was blown, it would run rich at idle, or not idle at all. Idle quality has NOT changed.