The Jeep engine has an ancestor that goes back into the 1960's, the 232 and later 258 cubic inch engines produced for American Motors by International Truck. They're pretty rugged and reliable. BTW, the AMC V8's from 290 through 401 were also manufactured by International. One of my customers many years ago was a retired foundry engineer who worked for International during those days. He shared a lot of history of the International/AMC relationship with me.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!