1.Remove the steering wheel.
2.Disconect the turn signal/horn wires from the under dash harness.
3.Remove the turn signal lever.
4.Remove the bracket that holds the column to the dash.
5.Pull the column off of the shaft.
There is a rubber plug on the end of the column that isolates the steering shaft from the steering column tube. That is probably the resistance you are feeling. I ended up getting a strap wrench and putting it on the tube near the steering box and turning it to get it loose. Then the tube should slide right off.
By the way, if you don't have a strap wrench, a pipe wrench will work.
2c65 is right, use a thick screwdriver or pry type bar to pop the base off of the steering box! Easy Job. and if I am not mistaken that bearing that comes out with the column should be taken good care of, I do not think you can buy it if you lose it and without it the steering wheel will have a ton of play and would not be enjoyable to drive..LOL.