I didn't realize that Jeep used a straight 6 other than the 4.0. I had a 1986 Cherokee with a 2.8 V-6 that was a bad motor. I got it from an USAF guy who was transferred while deployed to Iraq in 1990. He left the title with his buddy and I bought it for $500, a steal even with the crappy motor. I drove it for awhile and then sold it to a local girl as a school car for what I had in it.
Basically the same block, different bore, stroke, and a much improved head. The head along with common rail multi port fuel injection probably made the biggest improvements to longevity of the motor.
