Well I havent exactly did that but have swapped out clusters and guages from 85 into my 89. From pics Ive seen the 91-93's look near the same, so I imagine you could switch the whole cluster or part one out into yours. That is just remove the speedo and install it in your cluster, any guages that you want as long as your started with those guages, that is if you had a oil pressure dummy light instead of a guage then you can't just install a guage and expect it to work. I recently got a cluster out of a 85 D100, took the cluster and installed in my 85 D100, i took the oil pres guage and temp guage out and put my dummy lights in the back of the new cluster, then screw the dummy indicator plate on the front of the cluster. Swapped ammeters because mine didnt work on the W250, now I have extra temp and oil pres guages. Bill