Pro-Billet Ready-to-Run DistributorBuick NailheadCARB E.O. #D-40-39Red Features:Powerful built-in module produces a 7.5 amp single spark through high rpmEasy-to-adjust mechanical advance with supplied springs and stop bushingsVacuum advance canister for improved economy (can be locked out)Mechanical advance assembly can be locked out for crank trigger systemsSupplied with an HEI style distributor cap and rotor (accepts Cap-A-Dapts)Does not require an MSD Ignition ControlIncludes Built-in Rev Limiter50-State legalCARB O.E. D-40-39Simple and clean installation with only three wires to connectIncludes built-in Rev Limiter!Does not require an MSD Ignition ControlSupplied with an HEI style distributor cap.