There are many threads on this forum concerning dual carbs, and also Rochester type B's for your reading pleasure; searching should fine them.
(1) Make absolutely positively certainly sure that the power valves are functional, and not open all the time.
(2) Make certain the carbs are properly synchronized.
(3) "Would it be possible to blank off one carb?" : NO!
(4) We have found more often than not, if two stock carbs are used on the stock engine, LARGER jets are required because of lower venturii air velocity. Too rich is probably power valves (or a pertronix conversion, without an alternator).
Linkage can be difficult or easy to work with, depending on the type of linkage, and the experience of the adjuster. Make sure that, if either carb has a fast idle circuit, that the choke on that carburetor is not preventing the throttle(s) from closing.
Jon.
Last edited by carbking; 09/16/2020 5:03 PM.
