Changed out my original, sloppy box last weekend.
Actually, I pulled the steering box, steering shaft, vacuum pump and power steering pump all at the same time. Replaced vacuum pump and power steering pump, rebuilt the coupler seals (Gould) and replaced the steering shaft and steering box. (and of course I hosed down the entire oily side of the engine with stoddard solvent and cleaned all the caked up oil/dirt. It's all "pretty" again. :-laf )
End result -> Phenomenal
Steering is nice and tight, no wandering. Steering pump must have been getting weak because I have more brake boost as well as great steering.
Items to consider for steering box swap:
1. Heavy duty pitman arm puller required. Put it on, crank it up tight and then apply a little heat. (usually about a 5 seconds blast from a propane torch will do it)
2. while you have the steering linkage apart, check for other wear and replace as needed.
3. It's a great time to change the steering fluid. Don't be afraid to disconnect the lines and let them drain, drain, drain. Bleeding is easy just boring as you get to turn the wheel s l o w l y from stop to stop 15-20 times depending on if you have hydraboost.
5. No real surprises. Sometime wish for extra joint in arm but that is normal when working in engine compartment. (2 extra joints if behind dash)