In high school, I bought a 79 CJ7 with 20,000 miles when I bought it and most of those miles were supposedly behind a motorhome. Mine was a 304 two barrel and three speed. Gas mileage was surprisingly good. Low 20s on the highway. The drive train held up despite my consistent abuse but the vehicle was not great, even with low mileage. Mine had lots of nitpicky problems and oddly ate master cylinders for some reason. Lots of electrical issues, including some strange problems such as the marker lights coming on when braking (most CJs on the road at that time did that). Mine was unstable and scary above about 50 mph, but part of that may have been the highways I drove at that time, which were rutted by oilfield transport trucks. My friend had a CJ5 with a 258 and rolled his a couple of times but it kept going.
It seems that once a month or more I was working on something on that vehicle. I never wanted a vehicle more when I bought it and was never so glad to see one go when I sold it.
