With the Willwren starting to straighten this out. Let me add.
The supercharger pulley'* are 92-95 Series 1 pressed on and have a keyway.
96-0X Series 2 pressed on only
The tyipcal rattle would be a supercharger coupler. This is a round piece that looks like a Hmmm I described this yesterday..Let me get that link for you.
Here it is.. the green round plastic looking piece is the replacement coupler.
Coupler cost me $30
GM Red gasket maker $10
SC oil (2 bottles) $12
Fixed supercharger: Cost effective