Some cars have the upper control-arm mounts cut with a slot that makesadjusting caster easy. Some upper control arms are also slotted for thesame reason. If your mounting plates or control arms do not offer thismethod of adjusting caster, you can angle (from a top view) the controlarm shaft by moving shims front to rear. This is not the ideal method,but will work until we can find the right caster split that suits thedriver. We can then order offset control arms that will locate the upperball joint for proper caster without needing to angle the shaft.