No thread derail intended but, I've heard you can use (should use?) a smaller carb on a single plane because the large open plenum lessens the vacuum signal that the carb sees. Just thinkin' out loud.
I'm not seeing that being the case..... airflow is the same, and carb restrictions are the same. Sounds like some mixed info, or a cause-and-effect that is being attributed to the wrong thing.
