My personal favorites: The 1958 Dodge/DeSoto/Plymouth Fuel Injection badge (Chrysler 300s had a different one). The 1961 Dodge D-500 emblem (thanks to sylvian for the image).
1951 Studebaker hood emblem as verified by this photo..... I don't think that this is really a photo of an early 50's Ford pickup.....I know....you capitalized "THINK".