Dana 60 in my 73 duster?

We had a stock Abody 8.75 and fit an 8 inch steel wheel with a 275/60r15 28 inch tire in the wheelwells of our 73 Duster. If you move your springs in you can run bigger wheels. Do you need that? That being said it'd be a good starting point for dimensions. I couldn't say if the factory A body Dana's were the same length as the 8.75.