Steven,
This topic is discussed at least twice on month (maybe once a week).
Try a Search here (or, use Search in the menu above):
https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=searchSearch for "dual carb"
Do not type in a name in Display Name Search
Search back Newer Than 1 Year (more years, if you have the time).
After reading a few (dozen) threads, you should come back with your questions.
Note that the carbs that might work on any particular 235 set-up will most likely not be well-matched to any particular 261 set-up.
