How about a cross ram with a bunch of carbs? I call it my quad dual or hillbilly split dominator.
Now that's thinking outside the box!
If this is the Edelbrock X-F66 intake, I might suggest flipping the carburetors on one side so that they are opposed from right to left, so that the presentation is symmetrical for the two engine banks. One would at least initially believe that if the throttles in tipping pointed outward (toward the valve covers) into the plenum you would potentially experience the effect of lengthening the inlet distance to the inlet valve, and flipping the carburetor(s) so that the throttles in tipping pointed inward more pointed at the inlet valve would effectively shorten it. Believe me, the throttle angle has a significant effect on the flow presentation within the plenum area to the port runners.
Yep, makes the throttle linkage a pain, but you got it this far!
Scott.