Seller notes

The Spectre advance curve kit is designed for GM vehicles with HEI distributors. Three sets of advance springs are included to adjust the rate of spark advance. This kit comes with simple instructions for easy installation with no special tools or skills required. Simple instructions Three spring rates included For GM HEI distributors Easy to install with no special tools or skills required For customer support click ask a question and Pam or Don will return your e-mail promptly . Our regular ho...

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