Ok, that is a bummer, I thought you had the original copy of the invoice. I would definitely try to contact the original owner, or a family member. I had a co-worker walk in one day with a POP from a '70 Nova that her aunt bought new. She stumbled onto it and thought I might like it! You never know, keep diggin
It certainly sounds like the real deal to me. Let us know about the trans crossmember and the fuel line.
I stumbled onto a guy in an alley changing a wheel on a '72 Nova yesterday. Inside the storage rental unit was a '70 L34, a/t, 12 bolt posi, w/ buckets, non-gauge console, 2 exterior moldings, F41, and a - - paint code! You never know what's hiding!