If your going to replace the pitman arm anyway, don't waste a lot of time with a puller and fighting it to get it off. I just cut a slot with my die grinder on the side of it being careful not to hit the steering splined shaft to relieve the pressure and pop it off. Sometime they are on there so tight you risk damaging the steering box getting them off with a puller. The last one I did on my 95 Jeep I broke the puller due to it being locked on there but 5 minutes with a cutting wheel on my dremel and it popped right off.