Whos running over 700whp on an 8.75?

Yeaahh I have a 9" housing kicking around too, but I figured if I have to do the work to narrow stuff anyways I might as well do the 60 with 35 splines and never worry again. Especially since I can get the housing ends to weld on the 60 and retain my disc brakes with the ebrake cables etc.