The Mustang is a muscle car so cool, it's inspired hundreds of movies and songs since it was first released in 1964. Discover the fascinating story of one of the world's most famous vehicles. SUBJECT: High Interest, BISAC: JNF057040, AGES: 8-14, GRADES: 3-9, Guided Reading Level: T, LEXILE: 1010L, AR LEVEL: 5.7