if you want to go to maple ridge, 4 off-road does a really good job. You get a whole new rear half. They start the cut under the cab and cut to the middle of the frame, the cut parallel to the frame for a ways, then cut to the other side. Then they weld in a whole new section. Its expensive though. I heard around $1500. North Shore off road does a poor job in my opinion. They weld C channel around the old frame. Strong for a while, but water and crap just gets between the old frame and the new c channel and it'll rust away.