Unitized Ignition, Anyone?
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Nearly every production Pontiac left the factory with 1 of these 3 distributors. The HEI (left) first appeared on a limited basis around February 1974 before it went into full production in May 1974. The traditional points-type (right) was what most Pontiacs were equipped with up to 1971 when the Unitized (center) became an option. Since Unitized was available on a limited basis, many cars built through May 1974 were equipped with points-type distributors. Note how much wider the HEI is when compared to either Unitized or points-type. View Related Article
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