[Marshall V. Daut]

Make life easier on yourself and remove the starter so that you have some room to work. It'll take all of five minutes.
Drive a flat blade screwdriver between the steering box and the sector housing to begin separating the two by prying. You won't be able to pull on the sector to remove its housing from the steering box. Pry, separate and then remove the two pieces. Make sure you have removed the bottom nut, which is not visible by looking at the unit from the top. You must remove four nuts, if they fall into that every "living screw/nut bolt" category.
You better use a dedicated Model A steering wheel puller or you may damage the shaft threads or even the steering wheel. Do not use a "knocker" or you can kiss the shaft threads good-bye. We all thought we knew better at one time or other and used chisels, knockers or modern three jaw pullers - and ruined a steering shaft. $$$$$$$$$$$
If you plan on rebuilding the steering column completely, it almost has to be removed from the chassis to do the job properly. Leverage will work against you with the unit still inside the car. Unless you have a convertible, whose top will drop, you won't be able to slide the light switch rod and steering shaft out. They'll hit a closed car's top liner.
Just plan on removing the whole steering column and you'll be time and frustration ahead of the game. Good experience for you, too.
Marshall