Discovery on new Short Block

I recently received my short block assembly back from the machine shop and just started checking things over. In that process I found by depth micrometer measurement from the oil pressure sensor hole that the plug under the rear main cap was not installed. In removing and re-installing this cap, is there anything I need to be aware of (other than keeping things clean, re-applying assembly lube and re-torquing in steps), to assure I maintain the main seal integrity? I'll be changing one of the studs at the same time to clear my oil pump.

- EM