Stop in for a cup of coffee

Mattax said

You have all the tools to figure it out right there!
Take the adpater you have, see what fits

You can use Summiit's website which lets you pick by manifold and carb bolt pattern or measurements.
Carburetor Adapters

https://www.summitracing.com/search/part-type/carburetor-adapters/manifold-bolt-pattern/4-bolt-5-5-8-in-x-4-1-4-in?N=manifold-bolt-pattern:4-bolt-5-5-8-in-x-4-1-4-in+carburetor-bolt-pattern:4-bolt-5-5-8-in-x-5-1-8-in

Or just get an AFB you're not in a rush.
AFB Carburetor | eBay

Click to expand...

The confusing part when looking for the adapters is that the AFB and the Q-jet, T-quad spreadbores share the same bolt pattern.
Those spreadbores have huge secondary throttles - its pretty obvious in the photos if the adapter is for a spreadbore.
or call.