Describe the car that Johnny recalled seeing the night he was jumped by the Socs in "The Outsiders".The Outsiders: Chapters 1-2

This passage is on page 33 of my edition, in Chapter 2 (Puffin Books, 1995):

" 'There was a whole bunch of them,' Johnny went on, swallowing, ignoring Soda's command. 'A blue Mustang full...I got so scared" ... He had been hunting our football to practice a few kicks when a blue Mustang had pulled up beside the lot. There were four Socs in it."