I think the one I installed was an AMC engine. It ran pretty good when it was done. Lotsa low end torque for its size. the one I had to replace jumped valve time and broke valves and pistons,and the timing gear was smooth.
If it's any help,the bellhousing pattern on the 2.5 liter is the same as a lot of the S-10 4 cylinders had around that time;wouldn't surprise me if the 2.8 liter V-6 was a pretty easy install. You can still find good ones around. They were used extensively in Chevy citations and the likes.That might be a good place to look if you want another 4 cylinder for it too.If you go for the V-6,be sure it's the tall bolt pattern;the top two bolts are quite a ways up from the top of the flywheel. Also,get everything related to the engine you can grab from the donor vehicle;never know what parts you'll need to make everything work. Nothing's ever a bolt together proposition unless you find another engine from another Jeep,but there's a lot of engines out there that are close enough you can get them to work for you without much trouble.
