Edelbrock flooding out

Actually, the AFB style carburetors (Edelbrock or otherwise) don't like to see much over 5 PSI without problems. They share that malady with the Thermoquad. I've seen stock mechanical pumps overcome the needle and seats in these carburetors and flood them, so it's a possibility.

Put a fuel gauge on it and see what you have before taking anything apart. If the pressure is acceptable, look for other issues as already stated.

You didn't say but is the carburetor new?