The engine is a 4.2. Yes it has the computer carb. For a first time wrangler most here would be looking for a 91 or newer with the 4.0..Them is the fuel injected ones.
From the factory that jeep prolly had a 3.07 rear gear. If you are serious about it check out the tranny shift and stay in gear.. also check for smoke out the tail pipe and ALWAYS crawl under her and check all the insides of the tires and the entire underbody for leaks..
She should idle good for 5 minutes and come off idle real good.. and always run her in gear a few times at four grand to see how rpms sound and feel..
Then drive her at constant speeds in each gear and LISTEN for abnormalitys..
Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />