Tom,
You are welcome.
The camber screw specs are M10-1.5 X 40mm and any bolt will do on the alignment rack. Once the camber has been set the bolt can be removed. If the camber screws from the G8 were readily available you could use those too. If you use a Pedders camber screw or any screw other than the OEM screw it is important that you load it up with blue LocTite so it doesn't come loose while driving. As it has no real load on it there is little to keep it tight. Our technical term is goobber it up with the blue stuff
Pedders didn't invent the 5th Gen Camaro screw, we just tell people how to use it