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Old 02-19-2011 | 07:18 PM
  #1678  
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chris c
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Originally Posted by mxracer458
Our local track is running no timing class now for 17.5,I know some guys said 72 spur with a 32-34 pinion,the guys at my track are running 75-30 in there trucks.with a 72 I know I'll have more speed but will I have the
Bottom end also
Ocrc???
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