Getting the wheel off aint such a big deal but getting that lock cylinder out is a bit more complicated. There is a link here somewhere to a 1972 factory service manual fee download. That will be your best guide. Hope this helps
Got a torch? Check out the service manual as suggested. The steering wheel is easy, but describing how to remove the ignition lock cylinder is a bit complicated. You will need a cheap steering wheel puller that is available at any auto parts store.