Completely irrelevant except for
the anti sway bar
the engine mounts
and for 67, the oddball idler.
My 67 has a late spool mount (73/4) K and sway bar, and lower arms
Because of "the way I operate" for some time this setup had drum brakes
and even after the conversion to disk brakes, it had an early manual box with the early center link. I used a 68--72 idler arm with the 73 K
ONLY AFTER tearing the car down for paint did I install a late 73 power box, which dictated the large spline pitman arm, and the later center link and idler arm.