I posted that pretty late last night and omitted a key word... "not". As in "not sure they are correct".
That said, it otherwise appears to be an unmolested. Low miles car (typical conversion to duals aside). Would be interesting to know if there is a story. Late build for an executive? Keep in mind where it is listed.
As for why purchase this car vs. a 300, again, I can imagine a few scenarios. Buyer didn't want a "hot rod" 440? Cheaper insurance. Styling preference (70 Newport does have a nice grille.) didn't want hidden headlights. Put the extra cash towards options? My dad ordered a '92 Voyager loaded like a Town & Country (leather, etc.) at my suggestion and saved on both cost and insurance. If it still exists, it would be a head-scratcher in the minivan world.