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Sounds like your engine builder may have done it wrong anyways You have all forged parts. If it isn't a wiped cam lobe , carb or ignition the balance isn't right. Did you use ly rods or the big rods? A neutral balancer and stock flex plate for a internal balance is all that's required.



I think he said Six pack rods... I'm not sure why all the extra junk was required. A stock balancer and flex plate would have been fine for that build.