Did a quick search for some more info.
A thread you started:
http://www.ls1tech.com/forums/manual...s1-camaro.html
http://www.ls1tech.com/forums/manual...s6-clutch.html
OP mentions it's an LS6 clutch, noone disagrees:
http://www.ls1tech.com/forums/manual...s6-clutch.html
Also, I had parts look up a clutch for my car, 01 Camaro. It does list the part # as 12581650
BUT it has it listed for 98-02 F-Bodies. I hope I don't come of fas a jerk, just trying to clarify this.