I started asking around to see if anyone had ever made a custom plenum for the Holley Stealth Ram -- the plenum is held on by just 4 bolts and I figured it shouldn't be a very tough thing.
Someone has already done exactly what I was thinking about -- custom plenum, with the supercharger drawing its inlet from a Cowl Induction setup! (almost)
Watch a certain '70 Chevelle engine compartment for a setup like this in the future.