Unfortunately not. If you look at the way each bolt on to your steering you will see the differnce in the two. I believe the 4x4 takes a big nut on the end while a 2x4 has a bolt in the side to "pinch" it tight. I would get the 4x4 box anyway because it is worth more $$$ than the 2x4 one. If you had a 84 2x4 box it would work other than the different fittings from the pump.
BBB
