[Walt Fricke]

Anti-seize on the whole stud - the buggers are hard to get out, and if they get too hard to turn, you will torque them off - at least one. Hence, for instance, Stomski's tool to make drilling the broken stud out easier. If the nut gets seized, better to have the whole stud come out when taking your header off than to bust one off.

Or just put in dry.

Any reasonable torque will keep the nut in place, although you can use the sort of distorted (copper color, slot in upper part of nut) nut VW and Porsche sometimes used in low stress applications.