Oh, and if you do need more theres a cheaper way that is actually a tad better. Remove the lower hub bolt from the arm and slot the holes toward the center of the car about 1/4 to 3/8 inch. this also allows for adjustment of the camber. Tack these washers also when set.
Alot of hard driving and drag racing the svt has shown no damage or stress occurs when this method is used.