Just was wondering I have heard that the 73-74 SD455 had more horsepower than rated is this true? I know it was around 290-310 BHP which is about 348-372HP flywheel useing 20% drivetrain loss.
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Conrad
79 Trans AM 406 #12 heads Torker II intake Crower 60210 750 holley vac. sec. T400 3500 Stall 3:73:1 rear.  ECMTTFMFers. IHTTFMFers.
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