Seller notes

RPM PERFORMANCE BRAND GM Chevy V8 HEI Distributor Mechanical Advance Curve Spring Kit This H.E.I. Advance Curve Kit is designed to fit all GM H.E.I. distributors. This kit comes with 3 sets of advance springs to allow you to adjust the rate of spark advance from fast (Brown), to super-fast (Silver), to ultra-fast (copper). This kit will fit all 1974-1979 GM HEI distributors that are NON-COMPUTER CONTROLLED. This kit will not work with computer controlled distributors.Includes:2 Weights1 Center P...

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