What Carburetor Fits This Manifold?

This manifold was on my 318 when I bought it.
I've been told it's from a 360 truck engine...about 1974???

It had an Edelbrock carb on it with some weird adapter plate....

What carb will bolt up without the adapter plate?

Or if I want an Edelbrock/Holley - what adapter plate should I use?
I'm thinking in the 650CFM range...

Thanks in advance!

Top it off with a Thermoquad...