:agree:
I had a 1991 YJ 2.5L. Ran 31s with 4.10 gears.... wanted better MPG as well as power. I used a 4.0L TBI, H.D. Cat converter, better flowing muffler, modified airbox. Then I bored engine with 4.0L bored parts. Still didn't move faster on freeway, but went easier at 55-65mpg. I don't...