67 Valiant spool mount

The only "gotchas" with the lower arms is if you do or plan to run an anti-roll bar, and if the arms have factory tabs for the bar. Other than than any year LCAS

If you are using the big pattern 73/ later disk setup then you need compatible upper arms, spindles and lower ball joints

If your 67 truly had a 67 K, you can not use that idler arm, it is a one year only deal

The 4 pieces which must be compatible regardless of year depends on your steering box, as there is a large and small spline pitman. The pitman of course must fix the box, and the center line and idler must fit those, so box, pitman, idler, and center line must all be compatible. As long as you have "all pre" 73 or "all 73 and after" for those 4 you are fine

See this thread, post no 2

confused, steering gear compatibility