damn autoxcuda, how do you tell by those pics that the pitman and centerlink are 68-72? i got the k frame, but haven't seen 68-72 next to a 73-76 in a long time.
The end of the centerlink where the tie rod goes onto it is vertical in one of the pictures. Sort of like a twisted looking end. That is a 67-72 centerlink. I bet someone swapped that manual steering into the car above. It is easier to to find 72 and earlier manual steering boxes. So when a previous owner found that box, that forced him swap the centerlink, pitman, and idler to match.
If a k-member has a through bolt idler it is a 68-72 K-member instead of the one year 67 K-member with the 67 only stud idler.
The 73-76 center link has a flat looking end of the centerlink.
When I got a reman Mopar power steering box for my 68 Cuda in 1993 it was a large spline 73 and up style. So I needed to convert the idler, centerlink, and pitman to the 73-76 style and just bolt it to my 68 K-member.
When I switched to the 73-76 K-member in 1998 I just swapped all the steering stuff over no problem.