[citcapp]

I don't know in what context the term blueprinted is used in todays engine building but when I was a young man in the dark ages the term was use for an engine built to extreme close tolerances and the whole term was "balanced and blueprinted". I haven't heard that term used in a long time.

Unless you can get the original build sheet or talk to the builder you won't have any idea of what has been done to the engine. Pull the valve covers and oil pan if it was never run after the rebuild the oil should be super clean and the heads and bottom end should look like new