Someone is trying to sell my kid a 78 Cherokee with manual lockout hubs. The guy swears the hubs are original equipment. I'm not a mechanic or a Jeep owner, but I thought that by 1978 all Cherokees and Wagoneers had Quadratrac or Selectrac or whatever, and manual hubs were not even an option. I need to find out whether this guy is full of it. Can somebody give me a quick history lesson?