Throughout its five decades of production, the Ford Mustang has become a legend. What started off as a secretary's car helped pave the way for muscle cars. It always was and always will be an all-American example of affordable horsepower and much more. There've also been numerous special editions, one-offs, and a few other outright strange Mustangs that have popped over the years (disregarding the Mustang II). A few we know you're familiar with, while there are others that we haven't even heard of until now, thanks to this new video.

So here's your chance to test your Mustang historical knowledge. Did you know about the 1980 McLaren Mustang M81? What about the 1979 RSX Rally by Ghia?