With Ford's new Mustang unveiled Thursday, and the car's 50th anniversary in 2014, we asked collector car experts to tell us what the most important Mustangs through the years have been.
On the Mustang order form, the K-code was a $276 option package. It got you a 289 cubic-inch high-performance engine and 9 months knocked off the factory warranty. Ford must have known how owners were going to drive this car.
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