The Assy Manual is being nebulous on finishes for the steering section so I begin to doubt the finishes for the nut and lock washer on the sector shaft for the pitman arm.
Note, my car has a 1" sector shaft, which is the topic on this thread)
Specified is -S for the lock washer and S100 for the nut.
I have various finishes on the washer and nut (due to various boxes around here). Not sure what goes on the Shelby. (We can move this thread if the 16:1 Shelby box is unique).
1 set = Plain -S for both.
1 set = Cad for both.