Moroso 72355 Moroso 75-93 GM ProCoil HEI Ignition CoilMoroso 72355 Moroso 75 93 GM ProCoil HEI Ignition Coil ProCoil HEI, 1975 93 GM Increased Spark Energy! Bolt In Replacement! Finally, a coil design that gives your ignition system real power. Real ignition power that provides more complete combustion for easier starts, better idle, snappier acceleration, and more horsepower. Real ignition power that eliminates the "6000 RPM barrier" inherent with stock systems. We've combined low oxygen, high