A couple of years back a mate of mine supercharged a G200 isuzu in a Gemini ,used a supercharger he got from the import wreckers ( off a Toyota from memory )and used an SU carb ,To make it fit under the bonnet better he fabricated a small manifold from the top of the s/charger so the carb would lay across the top of the engine,worked a treat .As for clutches and such the supercharger worked like this ,,,It would only make boost when you put your foot down ,but when you drove the car normally,, in traffic and when on the highway the car only made vacuum .It depends on the size of pulley ,he got 3 different sizes made but the one he used most often made 8 psi when you gave it to it and made vacuum when you weren't .