http://www.fuelairspark.com/Products/FS-'Crank%20Triggers'-0.aspx
Modern electronic ignition systems are the best available option to deliver the right spark to the right cylinder at the right time. Crank triggers provide the ultimate in timing accuracy and adjustability, and FAST™ builds the best on the market today. The latest video from FAST™ demonstrates both the effectiveness of its crank triggers (available for Small and Big Block Chevy and Small Block Ford applications) and why they are superior to flying magnet systems.