You don't have to worry about the upper intake manifold problem, as your supercharger takes the place of that. The lower intake gasket is an issue however. If you're going to be working on the engine anyway, it would be a good time to "do it all". Get the aluminum framed LIM gasket from the dealer, Intense, GMParts direct, etc., and the Felpro supercharger gasket set. It will include the coolant O-rings that you'll have to pay extra for if you get the GM set, also get a throttle body gasket. Replace the coolant elbow from the LIM to the tensioner. You can get that either at the dealer, or on the Dorman "help" cards at an auto parts store.
Black 2000 SSEi, Silverstar Headlights, Angel Eyes fogs, 3rd brake light overlay, hi-flo cat, drilled 180 degree thermostat, Intense FWI, PCM, shift kit, and 3.4 Pulley. Solid front mount.