MSD - 83931 - Chevy 409/509 Ready to Run Distributor

This distributor is Ready-to-Run meaning that you simply need to install it in the engine and connect three wires to fire up the engine. No external ignition controls are required with this distributor because it has a powerful module built into the housing. This module produces a stout inductive spark that will improve the overall driveability and performance of your classic Chevy.