8 3/4 Rear End Brake Shoe Help

Charrlie_S said
Question? What is the bolt pattern on the axles? All "A" body 8 3/4 rears were small bolt pattern (5x4) from the factory, and the rear shoes were 10 x 1 3/4.

Ok I am pretty sure I've got a 8 3/4 rear end (741) that is 57 1/8" drum to drum, with big bolt pattern?? What is this out of?