The Buick Nailhead is one of the most sought after nostalgic engines for rods and is still providing the smooth power to plenty of Buicks. Nailhead fans can finally get a state-of-the-art distributor to provide the fire! MSDs Nailhead Distributor is a Ready-to-Run design which means that it doesnt require an external ignition box. This is because inside the billet aluminum housing there is a powerful ignition module capable of producing a high-output spark. This design also makes installation an easy affair with only three wires to connect! Just under the custom MSD cap and retainer is an accurate mechanical advance assembly. MSD supplies different advance springs and stop bushings so you can tune a timing curve to match your Nailheads needs! A sealed ball bearing supports a polished steel shaft to provide endurance and stability. To top it off there is a vacuum advance canister which can help economy on long drives.The Ready-to-Run Distributor is supplied with everything you need to drop it in and fire!