I have a 1991 yj, i want some more power. I only have a 2.5 engine. i was thinking about putting a 4.0 engine but was told you have to swap everything, and should just buy a jeep with a 4.0 engine in it. i was wonering if any of you guys ever heard of putting a turbo in a jeep. it would be easy to pick one up at the auto wrecker it just a matter of if it would work or not.