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Re: 496 to be DYNO'D!
If the convertor is right and the tires gear ratio and tire size etc works then yes you can keep timing locked however when things are not "perfect" if the engine bogs for what ever reason you are done .. way too much advance for given rpm etc. I would unlock it while you get the set up dialed in then once you are in the ball park then lock it out. But I see a plate on that truck so it does get driven on the street correct??
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