David, I'm helpless in helping you with your dilemma and curious as to the info you found.
I have a 700R4 that did not have the number where its suppose to be and, if the tranny guy is correct, he told me the number was filed off because it was a remanf. tranny. Since yours was "rebuilt" maybe some numbers were taken off????
No help to you but just my thoughts. Keep on trucking brother.


1937 Chevy Pickup
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1952 Chevy Panel
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1950 Chevy Coupe
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I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile