There are "high flow" needle valve and seat assemblies available, or you could install a high-volume electric fuel pump if it's allowed in the racing association where you compete. That problem was much more common with the pre-quadrajet Rochester 4 barrel, the 4GC. They really had small float chambers (2 of them, one for primary barrels, one for secondaries).
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!