I went from 3.23's to 3.90's and have the tko600. I think my 0-60 got a lot slower cause the car does not get any traction anymore. I can punch it at 40mph in 2nd gear and the tires will break loose. they are 275/60/15's BFG Radial T/A's
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70 GTO
462 E-Heads TKO-600 9-Inch/3.60's
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