isn't yours lowered??
It may not be a C6, but there is a very good set of pictures in the "wheels" thread that shows a C5 Z06 at stock height, lowered on stock bolts, then on C6 and longer bolts. I am amazed how high the original Z rides.
Here is the link: http://www.canadiancorvetteforums.com/forums/cosmetic-enhancements/88-wheels-3.html