Ok, I need to change to 4.10s anyways so why not just find 14 bolts with the gears I need? I have not bought the wheels yet but I do have 15" tires. So what donor trucks do I need to look for? Of course I want a bolt on deal. I have a 1990 suburban with a np241 t-case. Can this be done? The local gear shop says I should be able to find them for 700 or 800 bucks. I havent lifted yet so I'm thinking do it all at once. Also, will the front come with ball joints? mine are beat. Thanks.