Thanks, Jon. That helps. I was genuinely trying to learn something and not be a smart-arse.
Did you tune your carb leaner when you made the switch?
Well, sort of but without any jet/metering rod alteration. I'm using the YF 3211S which was the last carburetor Carter made for the 235. Jon H and I talked about it and he suggested adjusting the float to cause it to run a wee bit leaner (the 3211S runs leaner by design as GM was just starting to consider ways to limit smog in bumper to bumper traffic).