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We know nothing about manual transmissions. we just take the stock trans and put Transgo shift kits in them shimmed for race car, then run 10s. 4l60e = lock up.
Plus you have 4.10 gears right? That means you would need a 28" tire to go auto, which might make you slower than your current paddle boat times.
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1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
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