Marine Electronic Ignition Kit for GM 305 350 454 502 Cubic inch engines. Delco EST (Electronic Spark Timing)Ignition system is a High Energy Ignition (HEI) System with electric advance timing based on engine RPM. That means no weights to stick and no springs to break. Includes Distributor, Coil, Wire Set and all pigtails for wiring.
Used on all LH (Automotive Rotation) engines. ALL I/O ENGINES ARE LH!
Not for Roller Cam Reverse Rotation Vortec Engines produced after 1998.
Used on all of the later marine engines especially many fuel injected engines with the wires coming out of thetop of the cap.