Superjoe is correct about the frame--I would think that frame reinforcements could help--if the 4X4 is wrecked, can you get the frame too? Even if it is bent, that can be fixed by a reputable shop or you could buy a salvage frame. But, one has to consider that you can go out and buy a pretty decent 4x4 of that vintage ('92-'94) for about 3 grand. You will blow through a lot more than that tinkering with your 2x4.