What rear axle to purchase and narrow

Garrett Ellison said
The Chrysler 9-1/4 is also a viable option. You’re into it for minimal expense to start with and the cost of axles from Cass (Dr. Diff) and narrowing.

I agree! That one seems to be overlooked a lot. Only "possible" drawback is, it's not supported "quite" as good as some of the other choices.