Dana 60 S60 or Ford 9"

I don't know of a single fast car that's using a stock case. Even my S-60 isn't a stock case.
Agree, that's why it was said that it cost way more to build the Ford.
If you want some significant strength, you have to buy an aftermarket centre section.
Not so even with a stock Dana.
I was just trying to point out that a stock ford suffers from the same weakness in the axle caps because that is inherent in a banjo style axle. Obviously the Ford has its attributes, that's why they are everywhere. But a Salibury design is inherently strong.
Then let's say you want to have say 2 ratios of gears ready to change by dropping out 1 of your 2 or 3 aftermarket centre sections and what is the cost here for that feature to build the Ford.