1967 Barracuda column collar question

Thankyou @Cuda Al and @Murray the pics and the advice are very helpful.
In my car the bolt is a phillips head, and I believe there is a square nut that is supposed to be behind it.
So it seems like I do have to at least take the top collar off to get to the area in question.
Can I do that by removing the C-Clip or do I have to take entire column out of the car to get those collars off?


Here are some better pictures showing the situation in my car:

column_bolt.png

column_bolt2.png