Since I'm reading this for installation tips I'll offer this info:
Bolts with a torque + degree are preloaded/strenched. Replace.
Bolts with just a "standard" torque should be fine. But I'd replace them since the threads could be fowled enough to damage the chassis threads....and this would be BAD. Also, it's just plain easier working with new bolts.
Nylock nuts should be replaced.