According to MSD, the 7720 ignition box produces an even hotter spark than the Digital 7 boxes (200-220 mJ compared to 190 mJ).

The MSD 6A features a capacitive discharge ignition design. Most stock ignition systems are inductive ignitions. In an inductive ignition, the coil must store and step up the voltage to maximum ...

We show you how easy it is to convert a Gen III engine to a carb with the MSD LS6 Ignition-Control Box.