ive got a 91 non td,,i do know the "w " lead is back up there in the dash,,,,mayneed a different printed circuit,from a td tach dashboard,,,,,i raninto that,,ihave a 86 td tach,,and wanted toput in my 91 cluster,,,could add the wiring ontothe circuit,may be cleaner if you get correct printed circuit,,or get a whoile cluster w/ tach,,i bet it plugs+plays