PS Gear Box Rebuild

Which center link will you be using - 72 and back or 73 and up? Or to put it another way, try to use all the parts from similar years in the rest of the steering linkage. 72 and back mount the pitman and idler with the tapered stud in one orientation - pointing up; 73 and up uses the opposite orientation - pointing down. The 73 box will therefore have a pitman arm taper pointing down.
I obviously have not thought this through, but it sounds like I need to go with steering links, pitman arm and idler from 73 and up. I am definately using the 73 and up Kmember because the 73 and up OEM disk brakes requires it. Am I understanding correctly that the 68 arms, etc, will not work with the 73 steering box/Kmember?