Ok, so I have this lifted 2001 Dodge Ram 1500 but it is 2wd. I want to convert it to 4x4, but have no clue on how to do this. I have talked to people and most of them tell me it is not worth it, but my truck is in great shape with low mileage and I want to keep it. How would I go about turing my truck into 4x4? What parts will I need?