In those years ... yes they where that bad... mid to high 14s, ... it should be no suprise to you if you run that 12.9.
BTW, is that an actual track time? 12.90 or is that estimated?
If you run the 99+, you would have a better challenge.
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Lizard King, Bone Stock; 13.69 at 101MPH
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Extreme Burnout
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2000GT VS LS1
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Quartermile run
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2000GT vs LX Stang