front end alignment

How hard (or even possible?) is it to get 2.5-3.0 degrees of caster with the stock UCA's and bushings? Just wondering what limits of the stock hardware are.

Depends on the ride height. With the stock bushings I doubt most could get more than +2. With the Moog K7103 offset UCA bushings and stock UCA's though you can get +3 to +3.5* based on what I've seen. Again, it's ride height dependent.

You can get into the range of the "max street performance" settings in the above SKOSH chart with just the offset UCA bushings and a little ride height tuning.