Alternator Internal Regulator 280Z 280ZX 78-83New Reman alternator for Datsun 280Z and 280ZX, 1978 1980. The 1978 83 Z cars used this internally regulated alternator. Datsun Z cars 1970 77 used an external regulator. Manufacturer calls these 60 amp, with specs of approx 50 at idle and 70 at max rpm. Specs may vary slightly. * Some of the alternators may have a black painted rear housing, if you have a preference of housing color (bare or black) please notify us when ordering.