Spark wire length - '65 389 - Pontiac GTO Forum
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post #1 of 3 (permalink) Old 03-08-2017, 07:10 PM Thread Starter
 
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Spark wire length - '65 389

I'm going put new spark plug wires on my GTO, the old have a couple couple cuts and are way too long. It has GM HEI distributor and I want the wires to go behind the heads to the plugs instead of over the valve covers. Does anyone know what length each wire should be and will this a cut to fit application or... is there a brand/part number for 8 mm wires that are a custom fit?

Also, does anyone know the diameter of the stock harmonic balancer (where the timing marks are)? I want to put on timing tape and do not have calipers large enough to get a good measurement.

Thanks, Roqetman.
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post #2 of 3 (permalink) Old 03-13-2017, 12:50 AM
 
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Originally Posted by Roqetman View Post
I'm going put new spark plug wires on my GTO, the old have a couple couple cuts and are way too long. It has GM HEI distributor and I want the wires to go behind the heads to the plugs instead of over the valve covers. Does anyone know what length each wire should be and will this a cut to fit application or... is there a brand/part number for 8 mm wires that are a custom fit?

Also, does anyone know the diameter of the stock harmonic balancer (where the timing marks are)? I want to put on timing tape and do not have calipers large enough to get a good measurement.

Thanks, Roqetman.
you might try Jacobs wires...they come way long and you cut to fit...they also come in 8 mm...i've had mine for years and zero issues...good luck...
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post #3 of 3 (permalink) Old 03-13-2017, 01:25 PM Thread Starter
 
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I'll check them out. Thanks!
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