Bumper cars

Ok so I've looked all over the web at pictures of bumpers 1967 -69.. My Dart 270 came with the bumpers that have the black padded vertical push bumpers mounted on them . I know this isn't right for a 270 car, so I got to looking around and found them on 67 thru 69 GTS cars but not all GTS have them either. What option constituted having them or not. I thought I would throw it out to the experts. This is a picture of my bumpers.