72 Chevy truck Steering coupler dismantle?

[prateroad]

I've never had a reason to do this but I put a C50 cab on a '70 C30 frame. I'm using the C10 steering column going through the C50's column hole. They don't line up so I bought a ujoint that should fit the oblong shaft in the very middle after I cut it in half. I was wondering if anyone has taken that part of the shaft and pulled it out of the female end that it slides into. It has something like a plastic liner in the female end. It may be made to collapse there in an accident. I have a spare I could take apart with force but maybe someone here has done that. Any takers on this? All replies appreciated.