thanks Richard D.
I had already pulled my dash apart
and then I had a third, and much closer look at the vacuum lines behind the battery. all the lines looked fine until I realized that one line went nowhere at all.
look. it hooks up to a three prong fitting and the foam connector is broken.
well it's tape fixed for now and all is good in a/c land.
ps-to all you "manual" a/c switch folks. the eatc thread on o rings is not meant for us! don't pull your dash apart.