Product Description (continued): This solid state external voltage regulator is a high-quality aftermarket replacement designed specifically for Delco Remy 10DN and 20DN alternators. It fits many 1962–1972 GM cars and trucks that used external regulator charging systems. Built for performance and reliability, this unit offers a 14.2V set point, works on a 12-volt B-circuit system, and operates on negative ground. It is activated via ignition and uses terminals identified as F, 2, 3, and 4. Replaces OEM Part Numbers: Delco Remy: 1119506, 1119507, 1119512, 1119515, 1119519, D632, D635, D663 Standard: VR-103, VR131 Wells: VR715 Caterpillar: 9L7309, 9L7648 Cummins: 156960, 191818 IHC: 967867R91 Prestolite: 8-273 Interchange Part Numbers: Allis Chalmers: 70243986 Arrowhead: ADR6001, 230-12099 International Harvester: 967867R91 IPM: 1A-6053 J&N: 230-12099, 230-12098 Massey Ferguson: 1031060M1, M92, V92 Minneapolis-Moline: 10P3009 Regitar-USA: D635 WAI: 35-121 Specifications: Unit Type: External Regulator Voltage: 12 Volts Set Point: 14.2 Volts Circuit: B-Circuit Ground: Negative Activation: Ignition Terminal IDs: F - 2 - 3 - 4 Condition: Brand New Aftermarket Replacement