72 Scamp 318 2bbl Came from factory with which differential?

I had an original 38000 mile 74 valiant 4 door and it, unfortunately, came with a 2.76 open 7 1/4.

I hate the 7 1/4" axle... I broke 3 of them with a mild 318 with a 4bbl and dual exhaust and 340 cam, then replaced it with an 8 3/4" and never broke another axle....