Sorry to drag this on but I stumbled across some information in my reference library which lead me into new lines of enquiry and pieced to together the following from various sources.
I initially found a picture of the Chrysler K-300 as well a picture of the car belonging to the Shah of Persia (Iran), in situ, as part of his collection. Although there are some differences it is clearly a K-300 but it is strongly rumoured that more than one K-300 was built. The key point though, is that the K-300/Shah car bears no relation visually to the Flite Wing “twins”. The K-300 is an earlier car. I’ve seen various dates attributed, but the most probable is 1957.
Another source uses the Flite Wing twins to illustrate confusion in Ghia records and states that their official title for the Chrysler version is the “300” (note: no letter).
This however starts to make sense, as the vehicle in the original KarnUtz photo is apparently the 1960 prototype for a replacement Chrysler 300. I can find no evidence that this car was ever publicly displayed, or even given a proper model name, as a Chrysler. The replacement 300 idea was dropped and the prototype was reworked as the 1961 Dodge Flite Wing as indicated in my earlier posting.
JR