Yep - the only thing else to do is slide a stainless steel shim in between the intake and the head on the drivers side right in the middle of the manifold to block that passage. It will help to reduce the cooking of the carburetor and fuel percolation. Only do this if you have eliminated the heat riser function.
Just go to the kitchen when your wife is not around and find a flat bottomed stanless bowl. Cut out a flat piece of material with tin snips just wide enough to fit between the manifold bolts in the center of the drivers side. Bend a small tab over to help you push it in. Loosten the manifold bolts just a little and see if you can slide that metal down in there between the gasket and the intake. Try not to disturb the gasket too much. Tighten the bolts back up and see if that helps. It worked for me when I had the percolation issue.
PS - if you go snatch the bowl when the wife is watching, you are a BOSS!