almost all of the cj5`s had no tailgates and had permanant spare tire mounts. if you do have one either it was special ordered or someone did it later. that`s the difference with the 5 &7.the 7 was a little longer and had the tailgate with the swingaway spare tire mount. Actually the "FIXED BACK PANEL/RR SP WHL MOUNT" was a $12 option in 1978. I have the factory window sticker for a 1978 CJ-5 listing it. The 1978 Jeep sales brochure lists it under "Options and Accessories" as "fixed back panel and spare mount (CJ-5)".