I love a challenge, these were just that.
1961 Ford Starliner, 1960 Mercury Park Lane, and a 1960 Buick Invicta.
Here are some before and after pictures.
I still have my 1960 Edsel convertible, that I built in 1960.
I also have the first dealer promo my father gave to me in 1955, a 1955 Studebaker.
I currently have about 600 1/25 scale models on display.