Activating MDS

Had an idea, or brain fart, depending on how you look at it....

What if????

Pre-VVT 5.7 MDS, carb, MSD ignition conversion.

What if you could activate the solenoids on the MDS either by a trigger off the MDS box, manually or some other means? Like a nice high vacuum cruise, 70mph down the highway?

The MDS cylinders wouldn't pull fuel in, valves are closed, no vacuum, not sure if the carb would flood out the other cylinders and kinda negate the whole idea???

Any thoughts or flames?

Thanks,
CR