How far does 67 steering column fit into coupler?

I recently had to reset the tin top cover that holds gasket on the coupler. I had someone do some other work on the car and didn't secure it properly. I've since ordered a new top cover and rubber gasket. I'll put them back on carefully after I regrease everything after I pull the column to paint it. I've included a pic of my lower column the coupler and the shaft itself. My goal is to take the column out repaint it and put everything back with all new parts for the coupler new top cover and new plastic bearing inside bottom of steering column. I know if I take the two bolts out of the lower column the plastic bearing comes out. I also have to remove what looks like the metal sleeve in front. Then if I pop out the coupler roll pin and remove the shoes I can slide that out. What should I keep together so that when I put the column back it is aligned correct. I don't know if I can remove the metal ring securing bottom of column because the fastening screw is underneath and I can't get to it very well. Is there any way to spin the shaft so I can get to it? My other concern is that there seems to be movement in the shaft up and down in the coupler when the 2 bolts are loosened in the lower shaft. When all put back together how far down do I secure the lower column and sink the shaft into the coupler? I just want to make sure there is no play and shaft and column are tightly secured. I know I have some questions but just trying to learn.

Carl