I have the Olson kit on my car. If I had to do it again I would spend the extra money and go LSA drive. I may actually still do it. For some reason the pulleys don't line up and my keeps going from 6 to 5 rib.
im gonna piece it together as well, gm # 19368946 looks better and then i can add the a/c from other linkI was just going to post that.
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I have about 75-80% of that kit (mostly everything on the main drive not LSA drive) as I was piecing it all together with some different parts (i.e. ATI damper instead of stock)
Pay attention here for A/C (straightforward swap): LSA Accessory Drive AC Question - Problem Solved | LS1GTO Forums