superchargers

Does coolant run through the supercharger or just the manifold? same for the oil

Does anyone know where i can find some superchargers for the Buick Ultra that are bigger and better and increase HP more than the stock supercharger. And also any site you know of that sell aftermarket parts like the newer modle grill, hinges to make butterfly doors, light covers, etc.

Are they any good? Have you used one? I mean, the basic principal is there, force more air into the motor, but is obviously not going to be as powerful as something belt driven off the motor. I guess my main concern is that its not variable. Its either on flat out or off. Is it possible to...

Where could I find a supercharger for a 1970 Buick Skylark with a 350 Small Block Chevy? And about how much would it cost?

on ebay for around 70.00? they say they are around 70.00 and can add increase of around 15-20 hp. please let me know if you know first hand if they work.