That's what I was afraid of. Is it ok to not have both side CA's set identical as far as the lengths? I'm showing about 3-4 deg. more caster on the passenger side than the drivers side. The lower control arm bracket on the passenger is pretty beat and I'm guessing may have something to do with the caster settings being off, but I'm not sure yet.
You do NOT want to purposefully set your control arm to different lengths in the hopes of correcting caster on a SOLID front axle. If you missed it, the key word here is SOLID. The most you will do is put unwanted stress on your brackets and arms and will cause your joints to fail prematurely. In some cases, I have seen mounts get torn off and suspect that a couple of axle housings I've seen break were the result of this as well. Your caster being slightly off from one side to the other is COMPLETLY NORMAL.