To the son of "Mr Kim", I have found, via scanning the pages of Jalopy Journal, the owner to whom your dad sold his roadster Vette to; Louie Roundpoint. A native American, Roundpoint has a former crew member who has been posting pictures of Roundpoints various cars, of which included your dad's blue Vette rodaster. The car was still blue, albeit with some additional silver scalloping. I will direct you to the URL and page number tonight when I return from work
Bill