The gent at the engine machine shop measured them carefully. While he did find similar measurements to the ones I found on the flat part of the head, what he found where the cam rests is that it was so far out of spec. (.0020") that it was not millable and remain anywhere near safe for head integrety. He said if the engine had not overheated that the cams would have sized or broken before long.

What seems to have happened is that on the rebuild the mech simply milled the heads without ever checking where the cams rest. Which is exactly what Kevin warned about a few posts up.

Jon, I do have a full set of upper gaskets for the engine, but thank you for your very kind offer