Difficult to say looking at the pic`s, there seems to be some surface scratches I wouldn’t expect to see after machining. As I said I will be picking up a head next week from a machine shop I've used often over the years. I’ll post some close up photo's of the head surface which may help you compare yours to. Some heads in this link.
http://www.toyota-supra.info/forums/...&page=11&pp=10