All the 9737 parts were installed by Chevrolet. The sway bar was 1 1/16" and used two special bars inside the frame rail to support it. Some had QD rears. All the COPO 68's had the "Magic Mirror" tag except the very early cars that did not have any of the COPO parts. The Corvette Bronze demonstrator was an L78 non COPO. The COPO Camaro's used an MV coded block, that included a different carburetor. The cars would have been assigned a YS number using the tag in the door jamb. Early versions were screwed in, later units riveted. Only if converted to the 427. A YS number would still have been used on paperwork. I have never heard of an automatic version,but one with AC was sold. BKH