G.M. HOLDEN
Our exact reproduction G.M. Holden spark plug wire sets are manufactured to the original blueprint specifications, and are correct in every aspect: wire type & length, terminals, boots (shape, angle & color) & factory script. These Holden reproduction spark plug wire sets are also date-coded in either 1st or 3rd quarter.

These reproduction sets are identical to the spark plug wires as they would have appeared on the vehicle when it shipped from the factory.  For those of you concerned about having your car judged, our reproduction spark plug wire sets will pass all judging standards. They will look, fit and perform exactly as original.

AUTHENTIC EXACT REPRODUCTIONS
In order to satisfy the most discriminating enthusiast/restorer, we offer these authentic reproduction spark plug wire sets. These wires provide the finishing touch for any original or restored vehicle. They are built using original GM blueprints, cut to the exact lengths to provide a tailored look, and contain the correct factory script on the wire as well as the correct spark plug boots.
(See the information to your right on how to order G.M. date coded wires.)

G.M. DATE CODING OF
SPARK PLUG WIRES
In January 1961, G.M. began date coding spark plug wires for their own internal identification. Note: 1961 cars built prior to January 1961 would not use date coded wires!  The date coding identified the quarter and year in which the wires were produced. As an example, a wire date coded as 1-Q-67 would have been produced in the first quarter of 1967.

Research has shown that most cars had spark plug wires installed that were dated from 1 to 4 quarters prior to the build date of the car. This would validate that a vehicle having a spark plug wire set dated from 1 to 12 months prior to the build date of the car.

Our sets are available using dating of First (1-Q) and Third (3-Q) quarter of each year starting in 1961. Second and fourth quarter dating is not available, nor are they necessary due to the acceptable variance in time between wire set production and the vehicle's build date, a spread of 1 to 12 month.  A vehicle production run of a specified model actually began in September or October of the previous model year.

Example: The first 1962 models actually left the
assembly line in September or October of 1961. Keeping this in mind, you should determine when your car was manufactured and order the date code (year and quarter) for your spark plug wires accordingly.  The chart to your right can be used as an aid in determining the correct wire set to order.

G.M. Recommended
Spark Plug Wire
Date Codes

Car
Year

Vehicle Build Date

Date Code

  1961

 Sep. '60 - Feb. '61

 Not Dated

 Mar. '61 - Aug. '61

 1-Q-61

  1962

 Sep. '61 - Feb. '62

 3-Q-61

 Mar. '62 - Aug. '62

 1-Q-62

  1963

 Sep. '62 - Feb. '63

 3-Q-62

 Mar. '63 - Aug. '63

 1-Q-63

  1964

 Sep. '63 - Feb. '64

 3-Q-63

 Mar. '64 - Aug. '64

 1-Q-64

  1965

 Sep. '64 - Feb. '65

 3-Q-64

 Mar. '65 - Aug. '65

 1-Q-65

  1966

 Sep. '65 - Feb. '66

 3-Q-65

 Mar. '66 - Aug. '66

 1-Q-66

  1967

 Sep. '66 - Feb. '67

 3-Q-66

 Mar. '67 - Aug. '67

 1-Q-67

  1968

 Sep. '67 - Feb. '68

 3-Q-67

 Mar. '68 - Aug. '68

 1-Q-68

  1969

 Sep. '68 - Feb. '69

 3-Q-68

 Mar. '69 - Aug. '69

 1-Q-69

  1970

 Sep. '69 - Feb. '70

 3-Q-69

 Mar. '70 - Aug. '70

 1-Q-70

  1971

 Sep. '70 - Feb. '71

 3-Q-70

 Mar. '71 - Aug. '71

 1-Q-71

  1972

 Sep. '71 - Feb. '72

 3-Q-71

 Mar. '72 - Aug. '72

 1-Q-72

  1973

 Sep. '72 - Feb. '73

 3-Q-72

 Mar. '73 - Aug. '73

 1-Q-73

  1974

 Sep. '73 - Feb. '74

 3-Q-73

 Mar. '74 - Aug. '74

 1-Q-74