Pfadt Racing:
Thank you for the photos and link. They're very helpful. Good idea on setting the -1.5 deg. camber at the center position.
Here's a comparison of the two versions: lower left is the version for 2.5" race spring and upper right is for the OEM spring. The race spring version has the spring seat for 2.5" ID coil spring and has a longer taper. All the other parts are the same for the two camber plate versions.