rocker arms adjustment

I dont se them running either. Old chevys are supposed to, and sometimes you'll see the modified valve covers that guys used to swap on for setting them. The deal was, with chevy, you are tightening the nut on a stud in the center of the rocker. Not an allen head set screw and locknut on the end of the rocker. Something that needs to be considered too..If you have aluminum heads, do one side hot, button it up and re-fire, let it warm up again, then set the other. Trying to do both sides at once with aluminum leads to a few valves being loose later.