Tony,
It does not have power steering yet. I need to drive it more to get a better feeling of the car with the increased caster. My initial impression is that the steering is heavier but not sure yet if it actually needs power assist. I will take it out on the freeway in couple of days and try to get a get a better understanding of the change. Before the caster change, the car tracked well (I could take my hands off the wheel when driving straight) but the car did not return to center well when turning or changing lanes at speed.