SUpercharger Help!!!!

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Oh, and if you decide to keep your current 383, I'd swap the cam out for a 224/224 on 114 l/c. that cam will give you more torque down low, and the turbos will boost the top end power. The ex duration and 112 cl of the current cam is going to reduce your scavenging and cost you gas mileage.
Remember a turbo can give you an extra 1000rpm over an NA setup with the same cam, so cam appropriately (more mildly) to build low speed torque to cover up any turbo lag.