TorqStorm Supercharger build advice needed

RustyRatRod said

Here's you a curve ball. What about this? Use manifold vacuum on the vacuum advance for the boost retard. Set timing with the vacuum can attached. That way, when vacuum drops off........OR when boost is present, timing falls off some. Cheap man's boost retard......but would it work?

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This has been done and does work. Kind of. I think it was Volvo or maybe Volkswagen that had a vacuum advance AND boost retard distributor. But with the amount of people that barely understand how mechanical advance and vacuum advance actually work (let alone tune them), an MSD box and a dial on the dash is much safer and easier to make right.