Steering column mk1

[16V F7R]

Hi all, I have the subframe off for a refresh. I want to take the steering column out whilst it is easier to do so and maybe go back to an oe steering wheel and boss. My first question is, do I have to use a three leg puller or steering wheel removal kit to get this old momo boss off the column? The second question is will the column simply slide out the bottom then through the footwell into the engine Bay Area? The third question is I want to replace the bottom piece of the column with a new piece and I am going to have to remove it all to try and pull the splines apart for the bottom pice to go in as it is solid and I don’t see how I am going to get it out whilst it is in the car.

Any advice will be much appreciated.