this is from the manual.

Front Camber Link Length & Number of Washers Under Ballstuds:
Changing the length of the camber link is considered a bigger step than adjusting the ballstud height. Your first setting change on the track should be to try the inside vs. outside locations on the shock tower. Typically shortening the camber link (or lowering the ballstud) will give the front end less grip which is more stable. Lengthening the camber link (or raising the ballstud) will give the front more grip at low speed but it can have slower steering response mid-to -exit of the turns.

XRay has a great offroad tuning guide that is free on their site that goes into a little more detail.