That does help Dave, thanks.
There was dust covering all the caps so I don't think he has touched it. The oil was very old and black on the dipstick so I don't think he had changed that, but the anti-freeze could be fresh. If I can not drive it and warm it up to the point of the thermostat kicking in then I'm not interested. I need to cheak all the things you mention.
I called a couple of other guys selling engines or vehicles with a quote "390". A few of them were pretty easy to read by their inconsistent story, or just their demeanor alone - hence I know what you mean about less than honest sellers.
regards, Dave J