[C. Ludwig]

What engine management system are you using?

Normally, I'd say the LS truck coils are what you're looking for, but, IMO they require an ECU that is capable of direct-fire ignition. They do not work well with wastespark systems, due to dwell time limitations. The AEM/Mercury IGN-1A coils are one of the best inductive coils on the market right now, but they're a little larger than the LSx coils, and are difficult to package on top of the engine like you will want to do to clean things up.