Designed to fit all GM HEI distributors with E clips. The kit includes two weights, special center plate, three sets of color coded springs and two pairs of nylon bushings. Also, included is a comprehensive instruction sheet, complete with graphs showing typical advance rates using various spring/weight combinations. Product Features:Fits 1974-79 GM HEI distributors with e-clipsIncludes detailed instructionsWeights springs center plate and nylon bushings
