What rearend do I have?

Ill work on getting the pic to verify but Ill tell you that Mine looks exactly like the 8 3/4. Thanks yellow for the constructive criticism im finding that pics are a must. Dusterific that diagram is a perfect tool for my question.

The guy that owned the car before me had a 383 in it and had done some changing on it already so Im trying to figure out where im at to put my 440 in it.