1975 A833 od, any useful parts for non od boxes

Today I picked up an A body transmission of unknown origin. Didn't pay a whole bunch for it so I didn't investigate it to thoroughly. Once home I looked it over and saw it was a cast iron case with 1975 side cover 1976 case. I performed a tooth count and found out that unfortunately it is an od box. To bad because it is in excellent condition. I bought this hoping to use the main shaft to convert a 1965 trunion style trans over to standard output shaft.

Can you guys tell me if anything in this transmission will be worth keeping for either my 2.47 box, or the 3.09 box I have coming? Perhaps I should just sell the whole thing.