Original sentence: (Some mentioned that if the Barracuda was successful, the term for this class of automobile might have been "fish car," rather than "pony car.The first competitor was the Plymouth Barracuda, which actually went on sale on April 1, 1964, about two weeks before the Mustang.The pony car is a class of automobile launched and inspired by the Ford Mustang in 1964
Edited sentence: The first competitor was the Plymouth Barracuda, which actually went on sale on April 1, 1964, about two weeks before the Mustang making it the True Pony Car.The pony car is a class of automobile launched by the Plymouth Barracuda (a better performing car ,all around) but generally (and wrongly) thought as the Ford Mustang (Oddly enough named a Mustang although it's the slowest horse)