It really depends on what year you are working with. All later steering gears were large sector. There is no pitman arm for large sector and 72-older centerlink. You can swap in the 73-76 centerlink and idler arm along with the pitman arm and the late gear.
It's not the k-member that's the critical part, it's the centerlink and they are not always swapped together. The input spline on all the power gears is the same, but is not the same as manual gears.