Nifty 50 2,
I may be all wet on this, but I will say there is no 'timing' inside the box. The worm and sector can go any old place you want.
If the pitman arm is indeed keyed, which I think it is, then the only item that would be position sensitive would be the steering wheel!
I see it this way...worm and sector, any which way.
Pitman arm, must align with key.
Center wheels perfectly.
Remove steering wheel and position it properly.
All done.
Stuart