At this point, your problem can be either a small foreign object keeping the needle & seat from shutting off the fuel or a bad regulator in your fuel pump.
The internal regulator in my Holley red pump didn't last long, and I had the same flooding issues you have. The unit can be taken apart & repaired, but once you see how little there is to it you'll probably decide you need something better. I put in a separate
Holley regulator for under $30.
