Overview Street rods look great with matching era power plants and the early Hemi engines are a great fit! More rodders are turning to these engines and MSD is excited to offer our Ready-to-Run Distributor to bring their ignitions up to date! Fits early Hemi engines 331, 354. Ready-to-run distributors include a built-in ignition module. No MSD Ignition control required. Includes a built-in rev limiter Features Powerful built-in module produces a 7.5 amp single spark through high rpm Easy-to-adjust mechanical advance with supplied springs and stop bushings Simple and clean installation with only three wires to connect Mechanical advance assembly can be locked out for crank trigger systems Polished steel shaft is QPQ coated and guided by sealed ball bearings CARB E.O. Approved Maintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range Includes a built-in Rev Limiter! Vacuum advance canister for improved economy (can be locked out) Supplied with a HEI style distributor cap and rotor (accepts Cap-A-Dapts) Does not require an MSD Ignition Control