I'm gonna try and simplify, "maybe"
The 4 pieces which must go together is determined by what pitman splines you have. Once that, you must use whatever center link and idler that matches the pitman IE 73/ later or 72/ earlier. You can use any year K 68--up so long as you have an anti-roll bar to match the K as the 73/ later goes through the middle of the K. Or, you can fab mounts for the early sway bar and sling it underneath a 73/ later K like the 72/ earlier do. And, youll have to match the anti-sway bar tabs on the LCAs as they are different at the 72/73 split
I've heard a lot of push and shove about what boxes have what splines, and "I swear" I have a manual box with large splines. Maybe it's out of a B/C/E body I don't know.
You can use any year "anything else" depending on what spindles/ brakes you are gonna use
