I'm not positive but I THINK the ball joints on 98+ are different then 96/97. I know the lower control arms are different. On mine the ball joint slides into the control arm then the bolts go through. On the ones you guys have the ball joints bolt to it. You can see in the drawing there is a plate on the bottom and the ball joint slips into the opening.
The hard part about the bushings is the rear lower one. It's pressed into the frame instead of the arm so you cant just put it in the shop press. It likes to get stuck too. Being an Arizona truck yours might not be bad. They spent 8 hours pounding, pressing, torching to get mine out.