Panic has a point, though its really only 500cfm by the standard 1.5" Hg rating (a 350 Holley 2bbl flows about 250cfm at 1.5" Hg).
Still, thats a lot of primary.
What about progressive linkage?
Not ideal, since the primary carb has to reach back to feed some far away cylinders. Still, the HiPerf Buick straight-8 cars did this, twin 2bbl carbs and progressive linkage.
Not sure anybody else did this. Hudson "Twin H" was simultaneous.
