Unitized Ignition, Anyone?
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The up-close view shows wire markings. Produced by the Packard division of AC Delco, these wires were suppressed to eliminate radio "buzz" and marked with their manufacture date. Narrowed down to the quarter of each year, these wires show a production date of "3Q-74" or third quarter 1974. Since our distributor is an original '72 455 H.O. application with a 1112133 casting number, we know the original wires have been replaced at least once. Unitized plug wires were discontinued in the mid-'80s and NOS wires occasionally surface though demanding a premium. View Related Article
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