Anyone run the Weber knock off 38 progressive 2bl here on their 225?

George Jets said
That would be a fun project for you to set up Dual Progressives on a Chrysler Slant 6.

Have had great luck with those Progressives in the past. They are simple to pull the tops off and change the jets too.

The secondary on them acts just like the secondaries on a 4 bbl when you put your foot into it, doubling up on the power outout.

Yup, that's kinda the idea. Along the same lines as the mileage and power of a Thermoquad. I would try a Thermoquad if I had a good one, as I have a spread bore adapter for the Offenhauser intake.