Ok, so then you’re going to need 73+ upper and lower ball joints.
The 73+ idler and the pitman arms are also different from the 67-72 versions, you’ll need to match those to the steering center link you have. For example, if you have a ‘68 center link you will need a ‘68-72 idler and pitman. The pitman will also have to match the steering box of course.
It changes a lot, if they’re new you won’t need UCA bushings or the upper ball joint.
It sounds like a “kit” isn’t probably the best choice for you, since they usually include just stock parts for a single year. Since you have a ‘68 with ‘73+ disks with Hotchkis UCA’s any model year kit you buy will have a bunch of parts that won’t fit.
Your better bet is to figure out which specific parts your car needs and order them.
