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  1. 440bigblock

    Need to dial back my 440 to make it more street-able

    Gentlemen, Can anyone give me some advice on dialing back my car to make it more street-able. Current set up 509 purple shaft in a 440, 4000 rpm stall 391 or higher gear. 850 holley Sorry thats all the info i have. Car was purchased set up that way. I want to go with a lower stall converter...
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