Keith, You may or may not be lucky. I have allergy induced insomnia, so at 2:30 AM, I just happen to be still available to answer your question. My great good fortune to actually know the answer. Southampton is a body style name. It refers to being a hardtop. What is a hardtop? It can be two or four doors but it has no 'B' pillar, or a truncated one, which means with the windows down nothing between the wind shield 'A' pillar, and the rear window's 'C' pillar. So, there are two types of four door Imperial. A traditional sedan, which has a 'B' pillar and regular, full frame doors, and the Southampton, which has fully recessing window frames, which meet up to one another when in the up position. The easiest way to tell the cars apart is that the sedan has a third window on each side, as the roof does not need all the structural support at the back 'C' pillar that the hardtop does. Also underneath, the four door Southampton has a huge 'X' shaped strengthening piece in the chassis, as does the convertible. The sedan and the two door do not. Technically speaking their was no coupe in 1958, just a two door hardtop. A coupe implies a different body shape from the four door version, one that is 'cut,' reduced in size and weight in some way. Very often, what are called coupes are really two door sedans, but that it another story. The use of Southampton as a designation for hardtop was discontinued at some point in the early sixties. But the base model would gain a name of its own, the Custom model. Chrysler Corp's naming policies were a law unto themselves, devoid of logic and inherently confusing (such as Crown Imperial and Imperial Crown) to the public, who never really got around to calling the cars simply Imperials. Maybe because of their long history prior to 1955, when the cars became a brand unto themselves, or because they were still sold and serviced at selected, but regular, Chrysler dealerships, and were never a mass market vehicle, most people stubbornly continued to refer to them as Chrysler Imperials. Probably the most common question I get asked about mine is, "Who made it?" No one asks that about a De Soto or a Plymouth, I'm sure. >From a New Zealand perspective what you are going to have on your hands is a true mystery machine. You might wish to make something up when asked of the car's provenance. I suggest either South Africa or India. Both have automobile industries. You just might get away with it. Hugh