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408?

  1. 408?

    Dyno Board
    I’m looking for some advice, I am planning to build a new motor and am not sure if I want to do a 363 or a 408. I currently have a 306 that will be donating heads to this new motor. The heads are Vic Jr. that flow 321 @.700 and have a 230 runner and 60 cc chambers. I am looking to build a pump...
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