Holley/Demon Carb stumble

See if it changes your hacks/stumbles. I don't think it will but its worth trying. The HS bleeds change the fuel curve. A larger bleed will generally lean out the higher RPM range and a smaller bleed will fatten it up. They can also change the sensitivity of the main circuit to tuning changes. Bottom line make a change, if the drive-ability gets worse make a step in the other direction.