I didn't notice any purple tint on the PCV valve, This is how it reads...
AC SPARK PLUG
Type CV-746C
When talking to this engine plant paint guy he told me that he very seldom painted the bottom of the oil pan very well because you really had to get on one knee to do it. Quality control would come down with complaints of oil pans rusting out from no paint, so they would paint them while they were standing there as soon as they left they would go back to the easy way. He told me he could paint an entire engine and never leave his stool and not miss a word in his book!!
Also told me he didn't paint a bellhousing in thirty years, just hit it across the top. I asked him if I got a engine ready would he come over and paint it the way he did in 70, he said sure but he also guarenteed me I wouldn't like it.
Thanks for the nice comments Chuck!!
You can tell which side was down on the harmonic balancer.
CTB in crayon on block Z28 4 Speed