In 1948 well known race car builder Frank Kurtis took a wrecked 1941 Buick and turned into the custom car known as the Kurtis Sport  you can see in the photo and powered it with a modified Ford Flathead V8

Read Larry Edsall’s article at classic car.com Journal on Kurtis and his customs here

One of the cars is for sale in Saint Louis, Missouri a 1949 Kurtis Sports, the listing is here