Pitman Arm Indexing

[maddart]

Need to replace the Pitman arm and am currently redoing the complete front end.
I have to still remove the pitman but is there anything i need to do to index the arm to the shaft or indexing while reassembling the front end?
Is the pitman shaft/arm keyed in any way?

[furious70]

Yes, there's a missing spline so it only goes on 1 way.