If the cam is already broken in, the
oil isn't really that critical now.
The tall and skinny of it is that if you want to spring for it, Brad Penn would probably be the best
oil for the engine. However, it's high dollar. I would just use a good Mobil 1, Valvoline, or Rotella
oil in it, don't worry about
synthetic.
As for plugs....what ignition are you running? MSD? Duraspark?
A good Champion, Autolite, or Motorcraft plug will be just fine.