Ignition Points-to-Electronic Conversion Kit Model or Series: Ignitor for V8 1957-1974 Trigger Type: Hall Effect Voltage: 12 Volt Ground: Negative Ground Distributor Advance Type: Vacuum and Mechanical Advance Multiple Spark: No Lobe Sensor: No Includes Rev Limiter: No Compatible with CD Ignition Boxes: Yes Fits Distributor(s): Fits single-point distributors. Not for use with solid core spark plug wires. Operating Voltage: 8 V to 16 V DC Temperature Range: -50°F to 300°F RPM Range: 0 to 15,000 RPM 12-Volt Negative Ground (some 6-Volt and 6 & 12-Volt positive ground kits available) Note: Installation guide not included. Professional installation is strongly recommended. Please verify compatibility to ensure the item meets your requirements. Product updates may occur due to different production batches. Slight variations in appearance or color may exist and do not affect functionality. The color of the accessory harness is random and cannot be specified. Color: As shown Material: Plastic + Metal Package Contents: 1 x Electronic Conversion Kit (Model 1281) Only the items listed above are included. Note: Lighting conditions and display settings may cause slight differences between the image and the actual item. Measurement error allowance: +/- 1-3 cm.