Holley/Demon Carb stumble

I don't have that full page but its referenced the other way.
A and B are bleed locations in the well, what we usually call Emulsion-holes.
D is the air bleed

The small letters are references to the lines.
Line from o to z would be our goal.
Reducing the number of emulsion holes (might have been a tube type arrangement) resulted in late start as shown by dashed line n - b.