The timing specifications for a 1986 AMC Eagle with a 4.2L (258 cubic inch) engine typically include a base timing setting of around 6 degrees BTC (Before Top Dead Center) at idle. The total timing, including mechanical and vacuum advance, can range from 30 to 36 degrees BTC at higher RPMs. It's essential to check the specific service manual for your vehicle, as variations may exist based on emission controls and other factors. Always ensure the engine is at operating temperature when setting the timing.
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