There often times isn't a lot of oil getting to the rockers at idle although you should see some oozing. With the valve cover off and having run the engine for a few minutes (to give the rocker shafts a chance to fill) rev the engine for a few seconds. If you still don't see any oil exiting the holes on top of the rocker arms it's time to check for blockage. Good luck with it.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.