Whos running over 700whp on an 8.75?

@33IMP FWIW, I have no issues with mine at that power level in TQ & HP. 360 4spd 4.10 ‘73 Cuda, PS-PB car, 30 years now.
You are right, for you. I guess I come at it from a traction standpoint. With slicks, an 8 3/4 will last a while, but I wouldn't trust it, and I think I would replace it before I broke it. Heck, Mopar put a Dana behind a 375 horse 440, with a stick, and a 390 horse with a 727.