How to get steering wheel off 1974 Duster

Invest in a steering wheel puller, they are cheap. I have pulled them without by pulling out on the wheel and having a friend hit the shaft with a dead blow hammer or a hammer and brass punch. Be sure to screw the nut on flush with the end of the shaft so you dont go flying back when it lets loose.
I would get the puller, you risk shearing the pin in the collapsable shaft if you dont hold out on the wheel good enough.