QuickFuel 880 Surging/Missing At Wide Open Throttle

After a few cruises, lowering my primary floats a bit, ensuring my timing is on with 38 Total/17-18 at idle, and setting the idle mix at all for corners and a fuel/air mix of 11hg, it seems the surging is happening under hard excelleration mid way through the powerband and not so much now under gradual excelleration or at WOT. Cruising at 3000 rpm I can feel it surging and the tach is jumping around a bit.
Wondering about a leaner main jet in the primary, so 77?
Maybe it's a distributor or orange box module issue as it seems to be happening when vacuum is introduced.
Or do I go mucking around with variable air restrictor jets?
Kinds stumped. The carb works really well and pulls hard but gotta get this surging cleared up.