well, if you're lucky like me, a PO will have put an after market steering wheel on your car. One of the POs of my car put a LeCarra steering wheel on my car. For me it's a simple matter of removing the 10 screws that hold the wheel to the adaptor and removing the column shroud from the column. The shroud comes off easier with the signal and wiper stalks removed but I dunno if removing them is that great of an idea. My turn signal stalk must have been removed one too many times over the years, because I've had constant problems with it falling out all the time. I finally got fed up with it and "Gorilla Glued" it into the swith.
If your switches are like mine you can push them forward and that'll help ease the removal of the shroud. Not as easy as doing it with the stalks out, but it's not frustrating either.
In short, you shouldn't have to remove the steering wheel to get to the switch, but as mentioned above, you'll definitely have to remove the shroud. On my '76 the shroud is held on by 4 screws: 2 hold the halves together, and the last two (closest to the dash) srew into the column.