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ok i just rechecked my calculations and i was wrong...if you plan on doing more than basic bolt-ons you'll be shifting into 5th.
4th gear with 4.10s = 106 @ 5700rpms
4th gear with 3.90s = 112 @ 5700rpms
edit: for comparison, cutting a 2.0 60' i trapped ~ 103 with a shifter, mid-length headers, and a tune
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1999 Corvette FRC
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