Well hey, let's not get too far from the Gospel according to Fred Swain. Shock hole positions are used for setting spring rates, nothing else. Once set, they shouldn't be touched.

With that said, if going out on the tower made the problem better, it sounds like your front spring rate may have been a little too soft. Have you ever gone through and tried the method laid out in this thread by Fred?

Although, I am having a hard time figuring out how your on power steering could be better than your off power steering. Seems backwards to me. Have you tried adding toe-out up front? That will make the car turn-in quicker.