Get a call from a cousin. Her husband told me I could have the rear end from an old car of his. The car just happens to be the '68 Newport that I'm getting the 383 XP engine out of! The rear end should be an 8 3/4 since that's all they came with.
The rear end will either be a 2.76, 3.23, or 3.23 sure grip.....
Standard was the 3.23 though.