ignition coil questions

pjc360,

If it were me I would stick with what you have, it sounds good. It should be reliable, and provide proper ignition. I would think more HP could be found in ignition timing advance curve modifications, along with fuel mixture, not a hotter coil. To do that requires much work, measuring changes, and working towards positive results. It takes equipment and time.

To go farther consider crank fire with electronic advance based on RPM, manifold pressure and temperature. The system could also be coil-on-plug or direct fire with coil packs. Such system have correct dwell control, not requiring ballast resistors. While you are at it, might as well go fuel injection, it makes for better tuning. At that point might as well buy a new Challenger.