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

I have not had any good luck with the annular boosters, but i did ran a 850 quick fuel on a 360 in my Duster drag car, and could get the jetting right, i was into the 60s on the primary jets, and still not enough, put a 750 on and no problem with jetting, and pick up a bunch of ET.

Did you buy a carb with annular boosters or did you change from a down leg to them?