SB K-memb Decode!?

The pitman/idler are specific to the centerlink used.

67-72 enter from the bottom, pointing up.
73+ from the top pointing down.

The K frame has no bearing on this if it's only that piece. You can mix the 67-72 steering gear with a 73+ K frame and vice-versa.

67-72 are the biscuit motor mounts and 73+ is a spool style as mentioned.