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I run a 4.3 stroke with a 6.7 rod. If that helps



Do you know what the diameter is of your counterweights?

72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.