well,im thinking my zuk has seen its last leg engine wise?? Its burning 2 -3 quarts of oil a month and smoking something bad!So,my question is better to rebuild( which ive never done)or buy one from Petro or Low range thats already done and just bolt in??I am somewhat mechanicly able...ive had the trans out twice and clutch and that kind of stuff but ive never been inside of the engine or drivetrain which im wanting 4.9 gears in my T-case to and so my question is the same??better to buy already done???