Roots SC's tend to be too much too early on, making traction more difficult on light cars. They are also heavy with the heat. Centri's are a little slower on initial power delivery, and easier to cool the charge. Just a suggestion. You should talk to Bob at Kurgan Motorsports, up by Road Atlanta. He knows everythign there is about 302's.

I have a friend with a turbo Miata. Maybe he will do an Exocet.