Got Shell 93 Octane and now barely idles 1973 Dart 340

Is that the stabilized one?
That's pretty orange on my screen.
When I was still working in the motorsports biz,if a problem unit came in, and I saw that color, out it would come. Fresh went in;drain or ride the carb out; and in many many cases with driveability problems, they magically self-healed. Years ago, I had an 84 Hyundai-Pony. That beast would burn anything I put in the tank.I mean the stalest gas, and even mixed with diesel. Anything except water. I drove an awful lot of miles on free gas; that would not burn in Honda products. All summer long.
yeah water is heavier than gas. I'd like to see what's in the bowls, But I'm about 99% positive it ain't water.