The HY-Fire 6 box along with the Mallory Promaster coil is the best setup going today. We run this on BAD 8 and all of our customers with high performance motors do as well. 

HYFIRE 6 CD VI Multi-Strike CD Ignition Features At A Glance: State-of-the-art digital circuitry with 4 times faster processing. Boost proportional retard capability with optional harness. 2 stage rev limiting in 100 RPM increments. Automatic start retard circuit for easier starting. Built-in RPM Window Switch which is great for nitrous oxide. Easy-to-use digital display with push button controls.