MSD 6462 MSD 6 BTM Boost Timing Master Dodge Viper Supercharger MSD 8665 retard unit adjusts timing as boost custom cruisers.eu 01773835666 MSD 6462 MSD 6 BTM Boost Timing Master Ignition Boxes One stage Timing Retard Summit Racing How to use the Boost Retard and Vacuum Advance features Jegs Just a heads up, adding an MSD 6AL Digital Ignition Box will retard your engine timing. Make sure you check the timing on your truck post install. ##desolatemotorsports##desolatefamily##makingbroncosg