Yep they worked.Actually that's quite a neat looking head no fins broken.
Yes the number 2 on the head appears to be some kind of casting mark,I'm fairly sure it doesn't mean much.Possibly something like the second cast of the head.
As I said about the 0 on the crankcase still unknown what it means.Most of the crankcases have something other the engine number on them.
Looks like you got the hang of posting the photos.
