Seller notes

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 H.E.I. Advance Curve Kit, all GM H.E.I. distributors. Special design centerplate eliminates over-centering of the centrifugal weights. Designed by Nelson CrozierIf you are having is...

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