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306ci vs 331ci vs 347ci ???
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<blockquote data-quote="yzracer931" data-source="post: 10833522" data-attributes="member: 101692"><p>We just had two 347s come off the dyno, one made 380 and was a very mild build, the other was tested for hot rod magazine and make close to 500. It can be done, the heads were CNC ported, and supposedly flowed in the 300+ cfm range.</p></blockquote><p></p>
[QUOTE="yzracer931, post: 10833522, member: 101692"] We just had two 347s come off the dyno, one made 380 and was a very mild build, the other was tested for hot rod magazine and make close to 500. It can be done, the heads were CNC ported, and supposedly flowed in the 300+ cfm range. [/QUOTE]
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306ci vs 331ci vs 347ci ???
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