Sorry for the rack/box thing if it confused anyone.
But my major point guys is be especially carefull here. Its not a good sign when you can't get through the rack with a bandsaw and then are going to weld on it. Yes it is possible but be carefull - you don't want a fatique crack to get started in the end of the rack itself - it will be a far worse failure than a pinion failure.
The only way I've seen racks shortened (that I would trust) is exactly like zetec7 posted earlier. The rack remaines straight. The body if you are carefull can be straight or straight enough.
I have seen a good variation in zetec7's method where a machined sleeve holding the outside bushing and wiper was pressed and welded to the shortened tube.
Anyhow, I rarely get on a soapbox but I felt I needed to speak up on this one
If that scares you then consider this horror story. My steering wheel is welded to an adapter I made myself. That adapter is welded to the factory plate that has the nut welded in it. (that's 2 welds I did so far)
The steering shaft needed lengthened so I took a piece of 1/8" wall DOM that matched the OD of the shaft and cut the factory shaft and spliced the length of DOM and welded it on both ends. (that's two more=4) the rack needed shortened and welded. (that's two more=6) I also needed to lenthen my tie rod ends so I bought two extra and sleeved and welded them to make two long rods. (for a total of 8 )
So that's 8 welds that I, a non professionally trained welder did with a cheap piece of crap Harbor Freight welder. I fully understand that the failure of any of these 8 welds will result in a loss of ability to steer the car at speed. It is a scary notion indeed.