I got the engine remounted and I took a closer look at it.  The slop in the prop hub that was present  before I sent it in is gone now. Tight as a drum and it is the original hub.  When I took it off ,the hub and key looked fine but it had a lot of side-side slop after it was  pressed onto the crank.
I'm sticking with the story of the early batches of cranks not being built or heat treated properly.
I'll take it up tomorrow and see how it performs.
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