I also put one on my GN, and I also heard you had to swap the pitman arm. It looked exactly the same as the original GN arm so I didn't swap it either. No problems with it. You will, however, notice that the turning circle will be bigger because the F-body box won't turn the wheels quite as far as the stock box. I understand GM did this because of the lack of clearance with the wide tires that F-bodies had. I'm not sure if the ratio is any quicker. It seems like the stock box was 2 1/2 turns lock to lock and the F-body box is 2 1/4 turns, but this could be due to difference in steering stops It did seem to feel firmer, though.