Holley/Demon Carb stumble

So i'm done with the Mitty Demon.
It's a good usable carb now and i probably could make it work with a 50cc squinter pump but the proform will 60' all most 2 tenths better........The carb is off and will stay off until i build a bigger motor and decide to twist it 7500 rpm(no money for any of this)
The only thing that was not apples to apples comparison was that the Demon was jetted up 3 size bigger then what i was running it before. Trying to help with the stumble along with a change of power valve from 6.5 to a 10.5.
first on is the best run on SaturdayIMG_0128.jpg with the Demon and the 2nt on is the best run with the Proform.
IMG_0129 (1).jpg
all runs were in the left lane