Is this a dual plane manifold of a single plain?
how does your linkage work? does both primary open together or one at a time.
Not really up to speed on that part
I can see the backs of my intake valves through my butterflies! I think I can take the air filter off and get you a picture of the back of one of my intake valves...
That's my way of saying single planes lol and there's a big crossover underneath the carburetors to both sides as well for running Progressive carburetors. I just run them one to one now but I have run Progressive where I run the back carburetor for one-third of the throttle and then the front one comes in and catches up by Full Throttle. But now one to one so yes it's kind of running on its lower end of its primary I guess at Cruise I never even thinking about the secondaries likely?
