In the 51 years since Ford first debuted the original Mustang back in 1964, some pretty amazing cars have hit the road...and some not-so-amazing ones. Hey, when you've been making some of the world's most popular cars for over half a century, not every one is going to be perfect, right? For example, Mustang fans generally try to forget anything that came out in the late 1970s. Then, there are these Mustangs. They're still awesome, but perhaps not quite as awesome as the legends they've built up.