Ford 289/302 Street Pro-Billet Small Diameter Distributor For 289/302 Engines, Includes Iron Gear And Vacuum Advance. Must Be Used With An 6, 7 Or 8-Series MSD IgnitionThe distributor relies on MSD's race proven magnetic pickup and precision reluctor to deliver accurate trigger signals to the MSD Ignition throughout high rpm. The reluctor assembly is turned by a hardened steel shaft which rides in a sealed ball bearing for high rpm stability and endurance. Mounted to the top of this shaft is a fully adjustable mechanical advance assembly. The rate at which the chromoly assembly advances the timing is easily