Holley/Demon Carb stumble

The fuel delivery, i'm just not going to comment on until i have data.
I have allway ran 9 psi on a holley. a Carter carb won't handle it. Even my mechanical pump ran 8.
like your numbers above!

Just to clear up the site glass........both the front and back bowls were set above center. front was just slight off and the back was about 3/4 of the sight glass. When i lowered them both and reset the fuel mixture screws is when i got rid of the stumble and got the lean pop back.