[Gaz64]

A turkey pan's function is two fold, one is to act as a heatshield from all the sources around the carburetor, the second allows the carb to be fed with outside cooler air.
With a 427 at 2500 rpm cruising, we might be using about 1/2 of 300cfm (1/2 atmosphere, 15 in Hg manifold vac), so 150 cfm. That little tiny opening will not be supplying 8000cfm at 60 mph cruising. We need 1.5 square feet of scoop inlet area to supply 8000cfm in one mile per minute.

That's a duct opening of 36 x 6. That's a big scoop.

You might get a "supercharge" pressure in the airbox with a scoop of this size.