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05-08-2000, 10:33 AM
I have a 66 389 with tri-power and was wondering which plugs work best.
Any help would be appreciated.
Walt

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05-08-2000, 10:33 AM
I have a 66 389 with tri-power and was wondering which plugs work best.
Any help would be appreciated.
Walt

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Gach
05-08-2000, 07:22 PM
I've found the Autolite # 75 to work best. Seems to have the right heat range.