I don't think the AFB (edelbrock) likes much if anything over 5 psi, and like I said, 3 is really enough.
If she still actually floods with low supply pressure and good choke function and good idle mixture setting, then you'll have to go after the float/needle/seat stuff.
Maybe just a little chunka dirt in the needle/seat area from the pump change out. Easy to get a little crusty crud into a line when doing that. It's usually filthy down by them pumps.
