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  1. GN7 On the Dyno
    Here is the situation. I have a new motor its a 638" bbc, dart block, intake and heads. the headers are cmi split tops. the cam is from comp but it was a teage specific cam. the specs on the cam are 258* intake 266* exhaust* @.050" on a 114 lobe seperation. the headers have no drop at the tail...
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