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  1. Vacume secondary carbs

    Stroker Engines
    I have a 351w about to be turned into a 393 stroker that is used for circle track racing. It's already bored 30 over. This past race season was my first ever. I have to use a vacume secondary carb on there and I had an 850 on there with really big jets in it. The Motor was very laggie on the...
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