I have a similar engine on my Pathfinder, but I have no clue how to work on it. Give me a older Chevy and I could tell you with my eyes closed. It could just be a valve cover gasket and not the entire valve cover.
if I'm not mistaken there are little gaskets in the plaug holes on those it comes with the valve cover gasket set
Could be a valve cover... could be ringsCheck the water in your radiator for oil, if there is oil there it would be a head gasket / head.Does it smoke when you take off from a stoplight?
I say just put lop sided tires on it....do some grafitti work on it and drive it down main street during a parade! LOL......