Activating MDS

That
My answers in bold.
That's fine, but I disagree. It's a single plane intake and carburetor, the only way fuel gets in there is with vacuum. If it were port injected maybe, but even then I believe the vacuum in the plenum would suck most if not all of it out...

Thinking through the sequence a little bit, worse case you shut the valves after an intake charge, the plugs are still firing, if there's enough air, it will fire, it suppose to have the valves closed, just won't discharge the spent fuel.