At some point in the mid 1970s or so, GM (with Delco Remy) came up with a new electronic ignition system known as HEI or High Energy Ignition. We've touted this as an upgrade for many engines in ...
Electronic ignition systems for 1955-’74 Corvettes. Options, costs and pros and cons for the mechanical-tach Corvette model years. Plus, a how-to installation.
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