MOROSO 72310 Non-HEI Distributor Mechanical Advance Curve Spring Kit GM '57-'75

You are bidding on a Moroso GM Non-HEI Distributor Curve Spring Kit Part#72310 It is brand new in its original packaging from the manufacturer.   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   Shipping will be free to the US only. International shipping is available at an extra cost to be paid by the buyer, calculated, depending on the buyers location. Item will be shipped within one business day upon receiving payment for your purchase. Heintz Brothers is a locally owned small business in operation for over 35 years, meeting the racing needs of oval track racers, drag racers, dirt track r