Moroso 72300 - HEI Advance Curve Kits

• "Recurve" your distributor for full spark advance at the optimum RPM
• Three sets of advance springs allow you to adjust the rate of spark advance from quick, to super-quick, to ultra-quick
• Weights and centerplates precision stamped with smooth edges eliminate erratic timing
• Comes with complete installation instructions
• Fits: All GM H.E.I. distributors. Special design centerplate eliminates over-centering of the centrifugal weights. Designed by Nelson Crozier