Try Procharger. Tom directed me to this site a few months back and I must say that their information is impressive. Order their FREE catalog for the full scoop. I might be adding this forced induction myself, but maybe a little down on the road. I'm sure that Twinnie (Marck) can help with the turbos.
Opel Engineering located in Streamwood, Illinois (630) 837-2900. These are the people to go to if you want good blower motor in the Chicago area. A friend just had them build a 750 hp+ blower motor for his mustang with nitrous. I know a lot goes into a good blower motor (lower than normal compression ratio, STRONG lower end, etc). You might want to call them and see if they have any recommendations. Chances are they have already built one for a Vette and know what it takes to fit it all under the hood.