Richard, I'm glad you are so happy with the result! I thought it turned out nice too.
I did nickel plate the new valve stem, but then it stuck out like a sore thumb (on a vintage engine.) I treated the part with something called "nickel ager", but all it does is turn the nickel black. Rubbing the finish with fine steel wool then makes the nickel look like "black chrome". Better, but still doesn't resemble old nickel plating.
Anyway, I'm happy with how it turned out.