Sierra 18-26310-2 Chev V8 Electronic DistributorSierra replacement electronic distributor for GM 327Q, 350Q engines with electronic ignition. Rotation: Conventional; Designed for 12 volt negative ground systems; Combines the triggering device and amplifier into a single unit that sits inside distributor housing; No moving parts to wear out; Time tested reliability you need in extreme marine conditions; A simple wiring hook up allows this system to fit a wide variety of marine applications; This ignition system drives both original equipment and high performance coils; Improved performance and combustion efficiency; Improved spark plug life; Accurate spark timing; Reduced maintenance; Easy installation; Interchangeable with: Mallory; 9-26311; YLM566AV;