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  1. Miszny

    471 Big Block high rpm problems

    Hi I have been fighting with a problem that my car has since I got it. The car is 1971 Plymouth Duster with 471 big block + 727 TF with manual valve body. For ignition I have MSD 6AL with 7000rpm pill + MSD distributor. Engine is simple combo with hydraulic cam (540/544 lift due to 1.6:1 roller...
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