The light blue "Lucille Ball car" is #0318, i.e. #18.
The maroon one with the red interior is #0319, i.e. #19.
The gorgeous blue one is the "Bernie Berman car", #305, i.e. fifth one made.
The "Sinatra car" of course is the first production model made, #301.
There are seven more that I know of. One of them in Finland, one in Sweden. I know of five black ones, the Azure blue (Berman car), the light blue one (Lucille Ball car), three maroon ones, and a canary yellow prototype.
Sixteen of them have supposedly survived, so five are missing from my spreadsheet. Plus the ten that have been lost.
"The windshield is from a 1961 New Yorker..." What else is from a 1961 Chrysler? I bet the whole floorboard, along with the front and rear axles. As well as the engine and tranny, of course.
The overall design has more than a passing resemblance with the 1954 Ford Cougar Experimental car, that was designed by one John R. Samsen: