Whos running over 700whp on an 8.75?

Dana67Dart said
I would go Ford 9"
Cheap, plentiful.
Easy gear swap like a 8 3/4.
Multitude of housings with whatever reinforcements you want or could need.
Heavily supported by the aftermarket.

My only gripe with the 9" is the 3rd member alone costs more than I can build the whole 60 for basically. And the 60 is definitely strong.