The GM supercharger kit for the Cav/Sunfire will bolt right on, only problem is the reflash for the ecu will not work on our cars (different ecu). A mega squirt system would be a good system to use with a supercharger. Imo, I would turbocharge the car if your gonna go forced induction, its alot less work than a supercharger imo. People have had good results with both, check out
Ecotecforum.com, really good techincal info pertaining to 2.0, 2.2 and 2.4 ecotecs.