The pictures are a little deceiving I think. The twin "marks" are scores that can barely be felt cutting into the lobe with a finger nail. No metal appears to be lost between the marks.
I have a magnetic drain plug in the pan and it was clean/no metal. I did cut the
oil filter open to have a look and again nothing in there either. Could be ultra fine stuff that couldn't see by washing the filter material out, but nothing big enough to see or feel.
I'm going to post more pictures as I go because you guys are good and this is really helpful. At the moment I'm thinking I'll just replace the cam and lifters.....and discuss the pushrods and rockers as I get to them and see what they are and how they look. The motor was supposed to be built all the "right stuff" at a big cost number. So we will see.
Thanks again.