Ford Duraspark triggering the Multispark box of your choice,the Duraspark can be wired direct or through the Duraspark module.I think this is a very sound set up with easy to get parts if needed and a choice of easy to get caps etc, the single part female cap or the two part with HEI lead connectors.You can get a rebuilt cast iron/steel gear distributor and go from there.I'm a firm believer in making the most of Ford parts,These are still used on the crate engines and theres sweet all different between the MSD magnetic guts and the Ford one.......