I just did what you are contemplating.
The hard to find stuff�
-The Ross steering box. (Try to find it with the triangular shim retainer bracket on top.)
-The inner worm gear shaft.
Not as hard to find�
-Outer column tube (There is a slight difference between the 2A and 3A)
-Outer tube clamp� (Holds the outer tube to the Ross box.
-Two part column to dash mounting brackets.
Easy reproduction stuff to find at all good vendors�
-Pitman Arm
-Bell Crank and hardware
-Ross Box rebuild kits
-Steering Wheel
-Horn button hardware
-Drag Link and rebuild hardware.
If the tie rods and tie rod ends are in need of replacement, these are also readily available.
If the bell crank mounting bracket was messed with, you should be able to find this too.
Tim

