Mystery film on cam lobes

Really? I have pull many of engines out of strange placed and never took them apart to get then running again. Sounds like you are looking at the camshaft already... intake is off? Just pour oil on it that has zinc in it and make sure everything is lubed good. Put some in the cylinders too. Leave the spark plugs out and get oil pressure up by cranking it. Put the spark plugs in, get the timing close and fire it up. It will be fine. The older cams are the good ones. I hope my crystal ball is working on this one too.