help identify this 8.75

wow sorry guys I found this site right after i posted this

http://www.geocities.com/motorcity/flats/1549/index3.html

So I have it figured to exactly be a 64 B-body rear end.

I need to know, can i run this under my duster without shortening it, since its only an inch or so wider? And since it has the bolt on type axles can I switch out to the newer type axles? and can I swap on later style backing plates/brake setup onto it?