The universal joint yokes are not removable from the shaft, so the steering wheel must come off to replace the bushings in the steering column.
Once the wheel is removed, you will need to disconnect the rod at the power steering torque motor (roll pin and woodruff key), disconnect the support bracket (p.n. G1284), and remove the 4 bolts that hold the cast steering column to the torque tube (Be careful not to twist-off the front two bolts. They are long (about 5") bolts, and it can be challenging to get a grip on the bolt head since it is recessed into the casting. Particularly if the bolt head is corroded). That will allow you to tip the steering column aft far enough to remove the steering shaft(s) forward. It is not necessary to remove all the wires and cables going to the dash, but it does make things easier. You do not need to split any of the universal joints to get the shaft out of the steering column, although with them out, it may be a good time to replace any worn u-joints...
Good luck with the wheel removal. They can be a bugger, and it's the most challenging part of this job. Worst case scenario is you get a nice shiny new steering wheel.... I've pulled several of them successfully, but have broken a couple during the removal process.
Note in the diagram below, the right pic shows the 1958 model with the keyed shaft, and the left shows the 1959 model with the tapered shaft.