That process of spline alignment caused the most consternation for me during this exchange. In the process of marking them myself, I noted the
marks. I did not take the time to figure them out.

The new box leaks oil. I packed it with grease instead. I thought I would do an autopsy on an old box to explore seal replacement and possible rebuild. I am not sure that there are many options to rebuild function without a new set of worm gears. I have a couple of seals to put in my good box if the process seems simple.

Most boxes I have tried leaked oil AND were very loose and non responsive with minor turns. They seem to be worn out at the center point.

What do ya'll think about moving the Pittman arm one or two notches over on the splines to create a more responsive center point of the steering.
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Antique Swedish Steel 71 142E color V#102