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As posted on The Vehicle Emmission Control Sticker located in front of the fan shroud under the hood the spark plug gap for a 1981 4.9 liter (305 c.i.d.) is 0.060

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2009-01-23 16:56:13
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2020-11-15 20:56:44
301 not 305. if a 5.0 mustang is a 302, 4.9 cant be a 305
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