Wow. I don't know what all that is supposed to be, but the Edelbrock looks to me like you might be able to go with a taller element from K&N. The K&N's are flexible, so all you need really is the circumference to be the same, and stick the taller filter in, and you're good. Unfortunately, you can't be sure of the exact circumference until you buy one. But then I'm sure you can return it if you just can't get it to work.
By the way, Edelbrock as you say undoubtedly had to make the filter fit with their rather tall intake manifolds under a "typical" car's hood. There usually isn't enough room under a musclecar's hood without some kind of a hood scoop for most combinations of aftermarket (better) intakes with many filter combinations. I know that's true with my '68 Firebird and '68 Corvette. On those, to get a good-enough round filter to fit, I had to use a drop base. I was concerned enough about not enough CFM being allowed past a drop base that I got Extreme-Flow top filter lids also.
Anyway, there's another question I had. You said you were running dual 5-barrel carbs??? I have NEVER heard of a 5 barrel carb. Why wouldn't you just run dual 4 barrel carbs? Or was that a typo?
