And then, there's the option of rebuilding the "rot-pot" you've got now. The standard knock on these carbs are warpage of the individual castings and wear at the throttle shaft.

If you do some internet searches you'll find easy solutions for these issues. I didn't have either of these problems when I rebuilt my "B" 6 years ago. No leaks, good performance at all engine speeds. I know I'm probably in the minority here but in my opinion the ol' "B" is a good carb for the 235.