I bet you'd be hard pressed to find a completely stock 440 that ran at all to do this install that you've watched happen for the last 45 years?
If it was the case He could just look at the damper and the convertor and Know what he had.
Apparently its not that easy.
Civilian? What are you even saying?

1957 Power wagon wm300 original 10.000 mile truck, 1964 dodge Polara Convertible numbers matching