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?
The collapsible shaft is two pieces, solid shaft inside a tubular shaft. There are plastic pins though both that would shear in collision. So defeat the pins to shorten the shaft reduces how far it could collapse in a collision. Defeat the pins to extend the shaft reduces how far the two pieces are engaged. I've never been this route so I can't say how far the two pieces are originally engaged or if giving up a portion of that would be a problem.
Your best route is the power to manual adapter from aftermarket. There is more than one vendor/source with considerable price differences. The adapter solves both length and box coupling differences.