Help decoding this 8 3/4

Whatsup guys. Thank you all for the help so far.

Picked up this 8 3/4 on offerup for $100 its not an exact A body rear end. But it measures 53" from back plate to back plate. Its a 741 case. I plan on shortening this for my 1964 plymouth valiant .

I picked up a 489 3:23 sure grip. And would like to use on this 8 3/4. I want to know if it can be used on this rear end body.

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