Okay, you've got a four barrel that you are trying to seal to a sixpack hood/scoop.
I've seen that done multiple ways. I've seen Giant cake pans with a rubber seal added. I've seen plates riveted to the base of a drop base aircleaner bottom (held in place by the element and top piece, sealed to the hood with foam. I have two done that way, one for a single four, one for a maxwedge crossram.
(Strangely enough, in MY case, in both situations my car ran harder at the dragstrip WITHOUT the seal to the hood. It may have been a carburetor calibration thing, but an A/B test, with or without the pan, without was faster.)
Frankly, the cake pan setup was very cleanly done, did not look at all like what it was.