Overview The Chevrolet HEI Distributor is a favorite for muscle cars, street rods and even circle track racers. The integrated coil keeps underhood wiring clean, and for race cars, the idea of running one wire to the distributor keeps things simple. However, when it comes to performance, the stock HEI falls short. | Note: The PN 8365 is designed to replace GM HEI Distributors that use a 4-pin ignition module. | Tig welded on top of the distributor shaft is MSD's adjustable centrifugal advance assembly. Three sets of springs and four stop bushings let you dial in up to 24 different timing curves to match your driving needs. Plus, there's a vacuum advance for those concerned with economy. | All of this is assembled around a precision and great looking CNC machined housing. The distributor is supplied with our new cap, rotor and coil cover and heavy duty gear so it is ready to install in your engine! | MSD answers the need for a strong, accurate and high performance HEI with our Pro-Billet HEI. The distributor is supplied with our Digital HEI Module and Coil so there is plenty of spark energy combined with improved dwell and timing control. Replaces GM HEI Distributors that use a 4-Pin ignition module Features Advance weight pins are staked and tig welded to the plate Special oil tract improves lubrication to the distributor and cam gear CNC machined billet aluminum housing and billet aluminum base Supplied with a 8.5 amp, single spark, inductive discharge ignition module, MSD PN 83647, and MSD HEI Coil, PN 8225 Nylon pads ensure smooth operation of the advance weights Supplied with brass terminal distributor cap and rotor A complete performance HEI distributor upgrade for Chevy V8 engines Polished steel shaft is QPQ coated and guided by a sealed ball bearing CARB E.O. Approved Easy-to-adjust mechanical advance with supplied springs and stop bushings Full spark energy output to 9,000 RPM Vacuum advance canister for improved economy (can be locked out) Advance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reduction Mechanical advance assembly can easily be locked out
