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The 1970 Plymouth Duster 340 features a factory timing specification of 6 to 8 degrees BTDC (Before Top Dead Center) at idle, with a total timing of around 34 to 36 degrees BTDC at higher RPMs. The ignition system was designed to operate efficiently with a vacuum advance, which helps optimize timing under various load conditions. For precise tuning, enthusiasts often adjust these specifications based on fuel type and performance goals.

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3d ago

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