How many using an A500 overdrive ?

I ordered a slip yoke for my A500, but I don’t know where the paperwork is right now, so I can’t give you a part number. I am measuring 1.680 on the outside diameter of the yoke. Here is a picture inside the end of the yoke, but I see full spines on the output of the transmission, no specific double wide one to fit that wide slot. Looks like it will go on in any position.

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thank you