This is what I'd do..........
Mount the superchargers upside down with the discharge vertical and the drive snouts replaced to shorten the overall length. Fab up some brackets to mount the superchargers on each side of the engine and use the pullies to run each at 5 psi each. Fab up some plenums with the discharge pipes for the outlets of superchargers. Direct flow to front mounted intercooler, with intake on the sides and a top mounted outlet which then goes to the carburetor bonnet.