I'm surprised you don't set up your own differentials , that does sounds like it's gonna be a great difNot sure what it is to be honest. I told my gear guy that built all my diffs when I was racing offroad to build me something stout for the drag strip and this is what he came up with. He said it was a pro gear set but it can also be driven on the street We are adding a back brace to the housing and then I’m certain it will hold up to anything I can do to it.