Well I can tell you with certainty that they are interchangeable with minimal modification. I am currently running the 95 Sport gauges in my 87. The only things that aren't working currently are the brake light (which I dont think was working right before the conversion), the charging light (which never worked after the FI 4g64 swap) and the Tachometer. As mentioned above I have only had to move one wire on the 10 pin connector for the oil pressure gauge and cut out the hole/clean the contacts for the added 4WD light. I did forget to mention that I added a wire from the gauge (reed switch) to the ECU for speed input. I am not sure if the ECU really needs that input to function correctly but it is a California ECU so probably.