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| Feature | Specification |
| Primary Part Number | MOTORCRAFT GY-1303 |
| OEM Part Number | D4HZ-10304-A (Ford/Motorcraft) |
| Function | Alternator Rectifier Assembly (Converts the Alternator's Alternating Current (AC) output into Direct Current (DC) for the vehicle's electrical system) |
| Voltage | 12 Volts |
| Alternator Type | Designed for specific, heavy-duty alternator models used on commercial chassis |
| Component | Diode Plate Assembly |
| Construction | Metal Heat-Sink Plates with mounted diodes and connection terminals |
| Typical Use | Original Equipment (OE) internal component of the alternator. |
| Vehicle/Truck | Years | Notes |
| Ford F-Series Trucks | 1974 - 1979 | Medium/Heavy Duty models with specific alternator assemblies (e.g., F-600, F-700, etc.). |
| Ford C-Series Trucks | 1974 - 1979 | Cab-Over Engine (COE) medium-duty trucks. |
| Ford L-Series Trucks | 1974 - 1979 | Heavy-duty line haulers and large commercial chassis. |
| Ford B-Series Bus Chassis | 1974 - 1979 | Used on school buses and commercial bus chassis. |
