A much easier solution is to modify the cowl's air cleaner base. From memory, I took either 5/8" or 7/8" of and re-attached the seal-flange.
My GM hood closes against the seal no problem, and I have small block frame mounts and a Victor Jnr.
(I milled the Vic Jnr's carb flange the factory 4° like OE as they are "square" out of the box)
*** Steve, the picture link tried to run a script file - not good. I removed the link and attached the pic.****