For a track or street car I'd replace those caster bushings with ball joints, now's the time to do it while you have clear access in the engine bay. Even with those nice bushings you have your values will change every time you align the car.
Yes I plan on doing the caster ball joints. I got the bushings a while back and just used them to set everything up then read some good stuff about the ball joints. I also need to figure out my caster rods, because I could not get them to bust loose for ANYTHING. Any suggestions?