UBJ- put something (wood or a socket) between the UCA and the upper bumpstop to prevent the arm from drooping when you jack up the truck. Jack up the truck, loosen but do not remove castle nut. Smack steering knuckle a couple of times on each side and the knuckle should drop down onto the nut. No puller needed, so the brake line shouldn't be a problem. The rest is fairly self explanitory.

LBJ- Leave that spacer under the UCA, unbolt UBJ and use a pitman arm puller or sturdy TRE puller to get the stud out of the LCA. Whacking the lower one doesn't usually work very well since its hard to get at and gravity is working against you unlike with the UBJ. A pickle fork might work, but I've never tried that method.

If you don't keep the UCA from drooping or your t-bars are cranked, it will be more difficult to get the CA's far enough apart to get the BJ's in and out.

HTH.