Complete Bolt-In Replacements for HEI Chevy V8's Now there's no need to build your own tunable high-output distributor for non-computerized HEI Chevy V8's. The ignition experts at Moroso have done it for you! Moroso's new DuraFire Distributors come equipped with everything needed to customize the ignition timing curve for your particular street/strip application. It features several high-output components including Moroso's ProCoil that provides more complete combustion for easier starts, smoother idle, improved acceleration and more horsepower! Also included is a high-output module with extended reliability; cap, rotor and coil cover molded from advanced polymers for high dielectric strength and precise timing accuracy; and a mechanical Advance Curve Kit with extra springs to adjust spark advance from quick to ultra quick! Includes: High-Output Module Mechanical Advance Curve Kit High-Output ProCoil & Cover HEI Cap & Rotor Replacement Parts: Ignition Module GM HEI #MOR97857Distributor Coil Cover, GM HEI V8 #MOR97858Distributor Cap, Rotor & Brush Kit, GM HEI V8 #MOR97859Pit Stop USA offers Moroso Durafire Distributor - G.M - HEI - V8 - Without Vacuum Advance 72231 at low everyday prices. Be sure to check out all of our products from Moroso Performance Products including Moroso Performance Products Distributors.