Replace troublesome point or stock computer controlled distributors found in most 3.8L and 4.2L engines with a more reliable electronic ignition distributor with the added benefit of an adjustable vacuum advance. Simple three wire connection requires only a 12v power source and an external coil such as the ALL81232 or ALL81234. Distributors include a molded cap and rotor with brass and stainless steel contacts, a vacuum advance lock out, a mechanical curve kit with advance springs and stop bushings, spark plug wire retainer and installation instructions.