1985 D150 "Mr. Curtis" race truck with a 2015 6.4

Removed the SRT-10 axles diff cover last night and checked what i got myself: Absolute mayhem in a can!
4.56 gears with a limited slip differential.

There's zero wear on the teeth, no debris on the magnet. That combination should result in a rocket sled. Probably undriveable in the rain...