Modifies any GM HEI distributor with either clockwise or counterclockwise rotation and offers plenty of curve possibilities. Center plate eliminates overcentering of centrifugal weights.
Advance kit fits all '74-'79 GM HEI distributors except those that are computer-controlled. Includes two weights, center plate, three sets of color-coded springs, two pairs of nylon bushings and complete instructions.
PR550-929 Instructions
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