It is basically the same as setting a front wheel bearing with the two races and bearings, but you use shims instead of a big nut and a cotter key. Make sure the rear race is back in the box tight or it will affect the float when it settles down. What I usually do is leave the pitman arm, peg and shaft out of the box and dry fit some shims then turn the steering wheel end of the shaft by hand until I feel a little drag by inserting shims accordingly. Then when I am happy with that I use Indian head gasket sealer on both sides of the shims and tighten them down not too tight, but at a finish torque. I use Indian head gasket sealer on the bolts also because they go right into the box and fluid could leak past. I put the peg and shaft in after the sealer dries. Anyways it is pretty easy just use common sense. I must admit that once I tighten up the four bolts at the end so much that I warped the end plate and had one heck of a time figuring out why it was leaking until I took off the end plate and just looked at it close. I was very surprised that I could warp the steel, but it is basically a flat piece of steel with five holes drilled in it, so look at the end plate also before you start to assemble because you need both surfaces flat. Anyways good luck.
Sp53