1982 CJ7 Overhaul Part 2 - Engine teardown 

You are correct, if you take a look at the history of our CJ you will see we swapped the 4.2 to a 4.0 after we found water in the oil on the 4.2 ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-HVfV5dfA16k.html