I don't recall if the 84's have a much different dash than the 83's, but I replaced the stock speakers in my 83 UrQ with Alpine 4" units. The stock ones were held in with beads of melted plastic, which I cut away. With very minor mods (filing) to the cradles, the Alpines fit right into the grilles, and it all looks stock once screwed down. Hope this helps, Tucker Fritch '83 UrQ