The wheel is a real PIA. If I were to do it a gain, I'd buy the USGI Steering Wheel Puller from Saturn Surplus. It is made for the Duece Wheel, and will make life 100x's better. For $75, I think you will not mind spending the money for peace of mind.
However, if you do not buy it, then this is what you can expect, as I did this in the winter and will not do it again!
I used a Sawzall, and removed the three spokes and parts of the wheel hub in order to get a commercial puller around the hub. I needed the hub to have two large flat sides in order to get the puller to even close around the wheel hub.
Then I need to clamp the puller in order to keep it from backing off and opening as it was tightened. Plus I had to keep the puller screw from damaging the steering column shaft, because there is no place for it to fit. It was a two person job, and a lot of work.
Once the wheel was removed, and I filed off the burrs on the column shaft due to the peening caused by the commercial puller, I fed a New Horn Cable assembly down the shaft to the steering gear box, using a safety wire to pull it through easily.
I couldn't get my old original horn button off so I just broke the top and removed everything from the wheel.
Once the cable was fed and the wheel was attached, there is a hole in the shaft where the wire sticks out of the top.
With the New style Horn button kit you have to crimp a new waterproof plug on the end so it can be plugged into the new horn button.
Not bad at all. Very quick and the joy of the entire project.
Again I bought the USGI New style kit from Saturn and it came with all the instructions. Just remember to also buy a new Horn cable. You should buy two in case you stretch one too much and it tears the wiring inside the rubber insulation.
Ask me why I know.
Good Luck. Remember when it is done it will look like this...