http://www.impalass427.com/ Here's a great website for those cars and yeah.....it's true that the SS427 was it's own special model due to all the unique parts and badging on the car. That's always been one of my favorite things about them, especially the '67's! They really get to me! My father actually had a white 1967 SS427 4-speed car when I was growing up and sold it because my mother had trouble driving the stick-shift.