That tan-ish exhaust valve coloration in #2 is common and normal, and comes from additives in the fuel as I understand it. Looks like the carb was rich and put a layer of soot all over and you may find that same coloration on the other exhaust valves.
The oiling in #8 is pretty serious.... examine the cylinder bores to see if it has a lot more vertical scars/scratches than the others. just looking for clues to a possible broken ring. That looks like a lot more oiling than a valve seal would do.
The fire ring contact looks OK all around each cylinder as far as I can see.
I too would like to see the head casting numbers. Look on top for a 7 digit number cast into an intake runner.
I hope you got that coolant out of the cylinder right a way so it did not work down into the crankcase. Makes sure you clean it out of out the lower head bolts holes.