The dash switch mounts to the cluster housing itself, there is a different bracket that holds the wiper/headlight switch is different from the later year style, and I don't remember 100% if the housing is different, but the bezels have the headlight switch in a alightly different location if I remember right. The wiring is the same for all years though, I even re-pinned my factory '78 harness to plug into the stock gauge housings from an '81 LeMans dash (volt/temp/oil/fuel gauges in a different location than tach/speedo).
Last edited by a moderator: