Wow, this is a trip from memory lane - I changed out a standard column to a tilt version I found in a junkyard on my 71 Javelin years ago.
Funny how many parts they interchanged on AMC's back then. Pretty comical actually.
It's been a coons age since I've had them apart, but I believe the lock cylinders use physically different mechanisms, thats why the 2 different key styles?