Somewhere around 72/3 they changed the steering setup
You MUST match first, the pitman to the steering box (large vs small spline) Then the pitman, idler, and center link must all match each other, AKA all late model or all earlier model. The tapered studs on the idler, pitman, and tie rod ends (which you can just rotate) pointed up vs down, early vs late
73-76 steering linkage in 69 barracuda..
early setup
View attachment 1715219956
late setup
View attachment 1715219957
The only K member which affects things is the 67 which has a 1 year only mount for the idler arm on the K
The LCA/ upper arms/ tie rod ends are not affected
