My error on the water pump; it appeared as the late model replacement at a quick glance. Re-looking, I see the support ribs signifiying a C6xx or C8xx engineering number type.
As for the some of the valve cover bolts not being painted, my documentation is my experience with 67-68s, discussions with Kevin Marti (he has a few original engine assembly pictures), and of course, discussions with the ever popular Jeff Speegle.
Regards,
Pete