37coupe,
I ran one of the new Zenith carbs that you are talking about. Not a defective one, but a good one. And it ran great! They are internally balanced for an air cleaner. I will use the carb again when I put my '29 roadster back on the road. No, I definitely did not pay the high retail price for it. I got it for a 100
bucks. The carb "gu-ru" I got it from said he could never dial it in. I had no problems with it!
Bob-A