I'll stick by my comments. Owner of the vehicle states 'provenance'. Here's a reasonable definition of that:

'a record of ownership of a work of art or an antique, used as a guide to authenticity or quality'

He's got records showing the engine has been replaced, how is that authentic?

Further states, "Unmolested with most if not all original /stock parts" and yet it has a 400 hood, I didn't know they put those on 326 cars from '67? So, can't take everything he states at face value.

"needs repaint /refinish to complete restoration".

Okay, not being able to see the car, I'll go with the former needs a repaint. How much should I budget for that? Go over to PY Forums and see the mess people have gone through to get stuff painted in the last few months. I would say at least $5k even if it needs minimal body work. But wait, he mentioned that four letter word "minimal surface rust on small sections of undercarriage". Am I going to have to replace floor pans too?

So, I see an 18k to 22k car that needs works and would rather pay the 18k if I were a buyer.