This new reproduction instrument cluster voltage regulator is compatible/replacement for 1969-70 Galaxie 500, LTD, Custom, and Other related full-size cars; 1970-77 Maverick; 1970 F-Series pickup truck; 1969-70 Falcon; 1969-71 Fairlane / Torino / Ranchero / Comet / Montego; 1969-73 Mustang / Cougar. This is a new electronic instrument voltage regulator. The electronic regulator is more accurate, and does not need adjustment like the original mechanical regulators. Fits on back of instrument panel. NOTE: Electrical parts are non-returnable once installed. We will replace defective units only.