)...but that's my bet. Either way, can't hurt to start there instead of looking for other pitman arms.
Hmm, I'd let the other guys chime in, but as far as I know there were only two designs on the steering boxes between years (until the 88-98 body style), and the only real difference is whether it is 0-ring or not. But mine is splined all the way around in 2wd. My 4wd sector shaft was keyed with the cutout for the bolt to go through, so I'm not really sure.
Ok, I will pickup some Zero-rates then, I thought they would come into play aroung the 8" lift area no big deal will get some ordered up. Yes I did grab a 2wd box, the problem is the sector shafts are a different size and also the pitman arm has splines all the way around and the box has some splines and a notch for the bolt. So don't if I screwed something up or?

