Product Description
Advance Curve Kit. Fits: All 1957-'75 GM/Delco Non-HEI
"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
Built-in stop prevents the adjustment screw from "backing out" like other designs
Weights and centerplates precision stamped with smooth edges eliminate erratic timing
Comes with complete installation instructions