MOROSO GM NON H.E.I. ADVANCE CURVE KIT - MOR-72310

"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 and built-in stops prevent the adjustment screw from backing out like other designs. Weights and centerplates are precision stamped with smooth edges to eliminate erratic timing. Comes with complete installation instructions