Manual to power steer question

I'm doing the opposite I'm converting form power to manual. I have read about beating the shaft out to make it longer so I dont have to buy the adapter. I guess you can beat it in for the opposite? My question is where does the movement come from? Is there extra shaft in the column itself? I have never had one apart would it be easier to disassemble it and pull it out the the correct length? Or does it not work like that?
Is your car column shift? I might have a column shift manual steering column. Do you have a factory manual box? It's easy to do it with the stock parts if you have them.