what's keeping you from putting the cam in now?

I'd look at the LD340 modded to fit the t-quad...the air gap really isn't that tall, it's the same height as a performer RPM, which I think is about the same height as the LD340...

the mopar M1 single plane will also work with a spread bore, but IIRC is taller...

there's the wieand action plus and stealth...I don't think they're quite as tall as the edelbrocks...

the torker II IIRC is shorter than the RPM/air gap, I've never really been a fan of low rise single planes, personally.

with that cam and in a street car I'd probably stick with a dual plane....

1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)