Steering column cup replacement

[ScottH]

I have a 72 with a 3-on-the-tree. The problem I have (well, this one anyway) is the hole which holds the shifter arm in place is extremely worn, so the pin (larger, wrong one) is loose as is the shifter arm. I was thinking of replacing the section of column (I'll refer to as the cup) on which the shifter arm attaches.

Can anyone give me an idea of what is involved with dis-assembly of the column to replace the cup section?

Any info or suggestions are appreciated.

Thanks.