I think I have decided to follow AMG's lead and drop the idea of using a supercharger for increased performance. After all, it's not a mid-engine car that would be upset by turbo boost issues.
Whose got a good twin turbo setup for the 3.5L? A twin turbo 3.5L would be the ticket to provide better power to weight ratio then a stock 5.5L.
There's pleanty of space up there for it.