Here is my thought, D60, forged Inner Cs with everything from there out being D60 parts. Chromo inner shafts, detroit, and some nice gears. Truss the housing. Lighter than a 60, much weaker? I'm just moving crap around outside cleaning up and one thing is a front 10 bolt, it just got me thinking while I was cutting the leaves off it. If I were to REALLY consider that, It would be on something like a light buggy with 37s.