I dont think the Schoenfelds will work. Ive seen em on trucks with SAS but when I called them they told me they wont fit a 4x4. And I dont know about your truck but on mine theres a frame brace in the location where the GenIII ac compressor goes. And I have a friend that put an 8.1 in his 90 k3500 and he swapped out the cluster with one from a 92-94.