MSD Ignition 6AL Box w/ TSP Pro Billet Distributor Ford 289 302 MSD 6AL Ignition Box, Pro Billet Distributor and Coil. This Kit includes the MSD 6AL Digital Ignition Box, a 289 302 Pro Billet Distributor and 40,000 volt coil. The MSD 6AL box has built in rev limiter and is compatible with 4, 6 and 8 cylinder engines with 12 volt negative ground electrical systems. It delivers 530 volts to the coil with up to 135MJ of spark energy per firing. Rev limiter can be set in 100 RPM increments with two rotary dials and has built-in LED light for system checks. Box includes wiring harness, vibration mounts and all necessary installation components. TSP Pro Billet Distributor features a high quality, fully adjustable mechanical advance and an accurate magnetic pickup Trigger. The CNC-machined alumin.