What does you car weigh? The lighter the better for an 8 3/4, it's not the gears that can't handle the HP, it's the case, it pushes the ring gear back as it tries to climb the pinion and the caps can't hold it. They do make a billet cap that is supposed to help but IMO you might as well go to a Dana 60 if you are going to spend $ on a rear that will hold up.