How far does 67 steering column fit into coupler?

I'm going to be taking apart my 67 Dart manual floor shifted lower steering column so I can pull the whole column out of the car to repaint it. I've looked at other posts and the schematics on the connection between the lower end of the steering column and the steering coupler. I still have some questions. After I unscrew the two bolts in the bottom of the steering tube the plastic insert with metal bearing comes out. I then knock the roll pint out holding the coupler to the lower shaft. Then pop off the coupler top clip which holds the gasket on. Then the coupler and steering column should separate. Do I have this right? Also when I clean replace and reassemble the steering and column how far should the shaft coming out of lower steering column sit in the coupler? How do I avoid any up and down play in the assembly when put back together. In other words I don't want the shaft and column to be able to move up and down when I pull on steering wheel correct? If I'm missing anything please explain.

Carl