torqueing mains and treads came out. now what?

I've never, ever done that. Not even using an impact gun. Are you sure the bolt was the right one? A heli-coil could work i think. But I'd be VERY concerned using it in htat position and running the engine hard at all. In any event, I'd call it a machine shop repair. Might be better to drill and tap to the next size bolt...