using a Direct Connection K-frame

To sum this up the differences in the K are
1...67 only has the oddball 67 only idler mount
2...Early up through 72 K mounts the anti-sway bar under the K
3...Early K has pillow engine mounts
4...68/ later K can all use any idler except 67
5...73/ later K has spool mounts
6...73/ later K has anti roll bar going through hollow K. Anti-sway bars are shaped different early/ late

Either K series can use any upper A arm depending on your ball joint needs
Either K can use any year (67/ later) lower control arm depending on sway bar tabs if needed
Either K can use any center link setup so long as the "4 pieces" are kept as a set, the box, the pitman, idler, and center link
Either K can use any year tie rod ends setup

I don't know anything about B/RB pan/ center link clearance, understand those are issues