There is actually a sticky explaining how to do just this. There is also the gauge cluster from llate 91or 92?? i believe.. that is plug and play. But they are hard to come by and usually pretty pricey. I swapped one in my 90 that was out of a 94. With just alot of wiring and tracing. It helps if you can dig up the wiring diagram for both years (your truck) and (donor clust year) because the wires varied a little in color from year to year. I was fortunate enough to find both years on here.