If it's a 2wd, you have to torque the Jesus nut but very little. You torque it to 21 ft/lbs while turning the rotor forward, then you stop, let the Jesus nut out 180* and then tighten to 18 ft/lbs again. That's a fairly light amount of torque. He's gonna have to take the rotors to work and use the old 30-ton press to get the old races out and press the new races in. (Remember which is the inner race/bearing set and which is the outer.)