Thanks Frank50 and gusc.
It does have the have "walls" around the plugs. The valve cover is held down by two bolts sticking up out of the head. The valve cover itself has a rubber insert that fits over the bolts, then a couple of washers and a cap nut on top. The ignition distributor is held on by two bolts.
That is what I can remember off the top of my head. Tomorrow I'll take a closer look at things.
As far as oil pressure goes, I haven't the foggiest idea. I have never run the engine.
Husker