Mounting Thermoquad to air gap style intake. What adapter?

I love TQ's.
I tried the 850 on my 360HO with the AirGap and adapter.
IMO; for street use with street gears, this combo is a waste of time.
I tried several other carbs as well, but I found the 750DP was about the best on my combo, if a little large.

However; that same 850 on a proper small-port 2P intake, is dynomite on my Smog 318.

If you try this, make sure the secondaries don't snag on the adapter, at WOT! That adapter, altho it works, the transition is just too abrupt. Mine needed a thick gasket for secondary clearance.
If I had to guess, that adapted 850 made about the same WOTpower, as my 600 Holley, or the AVS off a 340car(580?).

BTW,
From my research:
Carter carbs are rated differently than Holleys, and because of that, you cannot directly compare an 850TQ (Carter) to an 850 Holley. I thought I used to have a conversion factory in my notes, but can't find it. Going from memory, the 850 TQ compares to a smaller Holley.
Does it matter?
Only if your 360 is a big-cammed, high-compression, free breathing, HotRod engine. The stocke lo-compression 360 can't hardly pull a 500/550 down at WOT.