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Re: Importance of a proper tune.
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1983 G20 Conversion Van, 383 TPI, 10.5:1 compression, Custom Reed Roller cam, Ported 906 Vortecs, Doug Thorley Tri-Y headers, dual 2 1/2" exhaust, 4L60E, 3.08 gears. 7427 PCM in MPFI Mode
Last edited by Fast305; 05-23-2008 at 11:27 PM.
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