Compliments of It L Go (post #2 here)
Z06Vette.com - Corvette Z06 Forum - Alignment for Street Use
This is the factory specifications for the ZO6, 01 and up. These are different than regular C5 specifications, so some shops alignment machines may not have the right databases loaded to show this:
Front Individual Toe +0.04 degree +/- 0.10 degree
Front Sum Toe +0.08 degree +/- 0.20 degree
Front Individual Caster +6.9 degree +/- 0.50 degree
Front Cross Caster within +/- 0.25 degree
Front Individual Camber -0.70 degree +/-0.50
degree
Front Cross Camber within +/-0.25 degree
Rear Individual Toe -0.01 degree +/- 0.10 degree
Rear Sum Toe -0.02 degree +/- 0.20 degree
Rear Individual Camber -0.68 degree +/- 0.50 degree
Rear Cross Camber within +/- 0.50 degree
For more aggressive track/street use, increase front individual camber to 1.0 degrees, and rear individual camber to .8 degrees, while reducing front toe to .06 degrees, and rear toe to the minimum (.01 degrees). This is a very drivable setup and increases mechanical grip noticeably. Some auto-crossers will get even more agressive, setting rear camber at 1.1 degrees and front at 1.5 degrees, and toe-out the front at .02 degrees, but this will cause a lot of tire wear on the street, and make the car a little "darty" on regular surface streets, but makes them really grab on tight courses on marginal surfaces
(more in post at link)