Well, I pulled the steering box out this morning. It turned out that the one thing nobody mentioned was that it will come out without even touching the tube ONCE YOU HAVE GOTTEN THE LOWER A-ARM OUT OF THE WAY. Which wasn't really that big a deal after I thought about it a little; I just put my jack under the inner lower A-arm shaft, buzzed the nuts off of the U-bolts with an impact gun, then lowered the shaft down until the spring was released. I didn't even have to jack the car up that much to get the shaft out.
So I've cleaned off many decades of crud, I have it leaning against a wall to drain out the oil, then Friday I will wrap the box in rags and put it in a plastic bag that is tiewrapped closed, then have to figure out how to package it to ship it to Illinois.
More to come.
Marty