Big carb (Quick Fuel 850) on a small engine?

What would you recommend? Engine will have around 236 @ .050 on the intake, 9.5 - 10.5 compression, probably Speedmaster or Promaxx as cast aluminum head. Early A body with manual transmission. Needs to run on 91 pump gas.

I’m using 20 hole boosters from Lightning Carbs. I have the tool to install them.

IIRC the Holley boosters are only 8 or 10 holes. And they have a different shape.