I just replaced my wheel bearings too, and its the one of the simplest fixes on our year mustang. The Torque rating for the spindle nut is around 221-295 (Chilton Manual). I had a 3/4 inch driver on my torque wrench, and could not find any metric size sockets, so I had to use standard size socket. Unfortunately Im not 100% on the size. If you have a standard size kit, just try which one fits best. I believe it is 1 3/16" inch socket or the next size up or down (at least this will give you a start).