This distributor sits low in the engine block, then is topped with our special Crab Cap that positions the spark plug terminals horizontally to give you plenty of clearance. The distributor incorporates a mechanical advance assembly that you can easily tune with the supplied springs and stop bushings. For trigger accuracy, a maintenance-free magnetic pick-up is used. This pick-up plugs directly into an MSD Ignition Control. The Flat-Top Distributor is supplied with our Dupont, Rynite molded distributor cap and rotor along with a heavy duty gear for long life in your engine. MSD Flat-Top Pro-Billet Distributor 84891 Includes Dupont Rynite Molded Distributor Cap/Rotor/Heavy Duty Gear - Chevy V8Flat-Top Cap DesignHelps Clear Firewalls And Intake CombinationsMust Be Used With An MSD 6/7/8 Series IgnitingMaintenance-Free Magnetic PickupAdjustable Mechanical AdvanceSupplied With Cap/Rotor/Heavy Duty GearBillet Aluminum CNC Machined Or Closer TolerancesPit Stop USAoffers MSD Ignition Flat-Top Pro-Billet Distributor 84891 at low everyday prices. Be sure to check out all of the products from MSD Ignition including MSD Ignition Parts and Accessories, MSD Distributors, MSD Chevrolet / GM Distributors, MSD Chevrolet / GM Distributors.