Manifold mystery

Anyone know anything about these supposedly factory manifolds? Seller thinks they have never been installed and are from 60-62 slants. I'm going to buy them, but just wondered if anyone recognized them.

Just figured out that they are the Hyperpak intake and exhaust manifolds. And, just bought them relatively cheap.

Wonder if they will be any good for my trubo build of my 170 motor?

Wayno
Austin, TX

View attachment slant 6 manifolds.jpg