I can get a pitman arm puller for $20 and I hope the box replacement will be pretty straight forward. I haven't had a good look at it yet but that lug "screw" might be a bit of head scratcher - there's no nut on it. You can see it just to right of the pitman arm connection - it attaches the lowest part of the steering box to the frame. I'll post any problems after I get the new one in.
(That shaft extension under the pitman arm is part of the BD Steering Stabilizer kit. I now get to take all that off again to replace the box. Good thing I don't do this for a living. )
By the way, the first time I noticed that my steering was stiff while parked, I just topped up the fluid and it was fine for awhile. Of course, as something's apparently leaking all over the place, that was a temporary solution. I'm going to try to make sure fluid isn't coming from above the box (like from the power steering pump, wherever that is) before I get that new box.
Is this what yours looks like, Herman8r?