My buddy is selling his Cherokee and it has a 4.0 that has just been re-built. I could get a great deal on it. I would be able to use the engine tranny and CPU out of the Cherokee. Is there anything else my jeep would need to do this swap? Will my d35 rear and d30 front hold up to it. And if not what gears on new axles would a 4.0 need to push 33's? And what axles? Thanks!