Help me sort my combo

“Top grade synthetic” doesn’t tell me anything.
What brand, what weight?
Muscle car specific oil?

If you’re not using oil loaded with an additive package specifically designed for use in these old school motors....... you’re going to have short cam life.

FWIW, I agree with the machine shop...... there looks to be some abnormal wear on that cam.
I can’t tell if it’s two different lobes, or two pics of the same lobe.