Bernie,
Are these originals that you unearthed or are they new reproductions your having made?
I cant tell from the Pic but there are versions of these where the head is larger on the early 60's engines that had the Thimble Drome on the tank. Then there are ones where the head is smaller that I would say are from 66 67 on.
Either way.. Thank you, We are glad to have them available and please keep doing what your doing!!!
Mark