[Lynn Johnson]

George - If it is that bad at idle, you very well could have a blown primary power valve. Did you check the PV to see if it was blown? A simple way to do it is to remove it from the carb and place it up to your mouth on the flat side and suck on it. If you can draw air through it continuously, it is blown. If you can draw air through it just enough to make the valve open, and not more, it is okay.

I had this condition once, and could not crank the car in the garage, the fumes were so bad.

Lynn