I am in the prosecc of swaping in a 94 wireing harness into my 84. There are two plugs for the instrament cluster in my 84 and both of them are what I call ribbon type plugs. The 94 harness has only on ribbon type of plug. So at some point there was a swap in plugs for the guage cluster. Of course I have an 84 and am going to a 94 wiring, engine, etc.