Cool, fresh suspension! I need to do that before Fontana in April
Camber, toe, and ride height are all interrelated so the answer is: it depends on your ride height and desired toe. The Box Spec guys that run minimum ride height usually target about -3 degrees front and rear. Some run -2 degrees. Here is a recent discussion on lowering and alignment targets:
http://986forum.com/forums/showthread.php?t=22029&page=1&pp=20&highlight=lowered+camber+rear+adjustable