This is a tough one.
It's a 4 door sedan that wasn't offered with a V8 made by a defunct Chrysler company between 1950 and 1985 (production wasn't necessarily stopped by '85, but it wasn't started after then). It isn't a Plymouth, Desoto, Imperial, Chrysler, Jeep, Dodge, Eagle, Fargo, Chalmers, Valiant, or Maxwell. It also hasn't won more than two major racing championships, so there most likely (but not certainly) wasn't even a racing version of the vehicle.
I'm stumped. Nothing fits the criteria according to Wikipedia.
18. Was there a convertible version?