Wow! Did this thread get out of control!
The K you show in post #10 is 68-72. That's good as it gets rid of the one year only (expensive) idler. You can use the existing 67 center link and tie rods with that BUT... You need a 68-72 idler. Period.
You didn't say what brakes you are going with, only discs. You can make it easy on yourself and tell us exactly what brakes you are using. Do you want to keep the Small Bolt Pattern or go to the more common 4.5 Large Bolt Pattern? The 67-72 stuff is conducive to using factory SBP.
Personally, if it was me, and you have access to the 76 K frame, (assuming it's a V-8 K) I'd use all that stuff. This gives you the fail-safe spool mounts, tucked-in sway bar and LBP. A 76 a-body for sure came with disc brakes that use easy to get parts. You can use your 67 steering box with a 73-76 pitman.
