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  1. Turbo 331 vs Turbo 347

    5.0L Tech
    I was planning on getting a 347 and turboing it down the road, but now i hear that for turbo applications 331 is better for some reason or another. Either one i decide to get it will be from CHP and it will be in a new boss 302 block. Which one is better? and one more question is a 75 mm...
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