Chevy 409/509 Ready To Run Distributor, PN 83931 Features

1. Specially designed for the All Aluminum 409/509 Block 2. Maintenance-free magnetic pickup never requires adjusting 3. Builtin ignition module delivers a powerful spark 4. Simple and clean three-wire installation 5. Includes built-in Rev Limiter

MSD now provides the spark for the new retro all aluminum W-block. This distributor is Ready-to-Run which means you just need to connect three wires to fire up the engine. No external ignition controls are required. It has a powerful module built into the housing. This module produces a stout inductive spark that will improve the overall drivability and performance of your classic Chevy.