Well let me be the first to welcome you to the world of American made muscle. As far as mileage goes, I would look at the shape of the engine and the overall shape of the Jeep. I am assuming by "bigger engine" you are refering to the 4.0 Inline 6. I have had that engine in both of the Jeeps I have owned. It was in my first Jeep, My Cherokee Laredo, It had 269,000 miles on it and still ran like a champ. Then through a long series of events I won't discuss, I had to sell it. I saw it again recently and it still was runnin great at over 350,000. My Yj has 101,000 on it. So just keep your eyes open for obvious damage and overall condition, you can't go wrong with a Jeep!!!
My 92 YJ
Clarion BD216, RF 200aIV, Clarion APA2030, RF HE2 12's, Rf 4x6's, RF 1" Tweets, Eclipse EUU-1300, Aura Bass Shakers Security: Clifford Power: Optima Yellow top,Thrush turbo 2 1/2" Exhaust, Radio Shack Sport CB, 102" whip antenna, Dual tips on Exhaust, K&N custom intake, KC Lightbar, 4 KC Daylighters.
Scored a 139 on the Jeep Rater.