360 Magnum engine

I have 4.88s with 29.5 inch tires, in my 73/74 Duster stocker that's not all together at the moment. The 360 is 75% together and the 340 is totally apart and needs assembled.

What Dana do you have under yours?
Dana 60, I have 4.88 5.13 5.38 5.57 don't know whitch one to use yet. Might look for 4.56 at Carlisle. I'm leaning to the 4.88 with the 360.