Shelby Mustang, mustang, ford mustang, Shelby GT 350, Shelby GT 350 Mustang

The countdown to the Mustang's 50th anniversary continues as the company has released a new video which looks back at the development of the original Shelby GT 350.

Things got off to a less than stellar start when Ford Vice President Lee Iacocca called Carroll Shelby, in 1964, and asked him to make a Mustang race car. Shelby responded by calling the Mustang a "secretary's car" and saying he didn't think it could be done.

Iacocca wasn't dismayed and told Shelby "lets take the V8 and hop it up to 300-350 bhp (223- 261 kW)." He also said change the brakes, the suspension and take out the rear seats.

After the work was completed, there was a debate over what to call the model. In the end, Shelby called the shop foreman and asked him to count out the steps from the corner of the building to the Van Nuys airport. He walked out and counted 347 steps, so Shelby decided to round up and call the car the GT 350.

The rest, they say, is history.