Yep, changed out the bushing with the column on the truck. Getting the intermediate shaft off was no problem. All you do is rotate the steering wheel until you can get a long extension in behind the vacuum booster and get a socket on the pinch bolt that secures the U joint to the lower end of the steering shaft. Here's the upper end of the intermediate shaft:
The lower end of the steering shaft has a "Double D" shape - keep this in mind when you start putting the U joint back on the lower shaft. It ain't splined - you have to line up the rounds and flats. Look closely at the picture and you'll see the threaded hole for the pinch bolt that secures the U joint to the steering shaft (the bolt comes in from the backside in this photo). Directly opposite that, notice that the opening in the U joint for the shaft has an interior flat (at 6:00 in this photo). Just unscrew the pinch bolt and remove it completely, then grab the upper end of the intermediate shaft with your left hand and push down toward the steering gear to telescope the intermediate shaft while you finagle the U joint off the steering shaft with your right. With enough wiggling and cussing, you will eventually collapse the intermediate shaft and walk the U joint off the steering shaft. Note - you will probably come away with battle damage to your lower right arm because of the tight space behind the vacuum booster.
Getting the spring off the steering shaft is no big deal - a few minutes with a Dremel and a cutoff wheel will cut through the metal spring keeper on the shaft. Just be aware that when you do finally cut through the keeper (and probably a coil or two of the spring), the spring will shoot off the shaft. Your cutoff wheel will be history, but that's just a nitnoy thing. I tried putting a hose clamp on the shaft to prevent this, but the spring blew right through it.
It's really a fairly straightforward and simple job.