My old 2000 Z28 was around 3800lbs with driver in race trim. It made 480RW on a stingy dyno. I had a SY3500 Yank converter, and 3.73 gears with a 28" tall drag radial. It was a consistent 10.7 - 10.8 car at 124-125 MPH. The best thing was the 23-24 MPG on the highway with the OD trans.
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi
1969 Malibu COPO L72/M20/12 bolt 3.31 posi
1968 Malibu LQ9/4L80E/12 bolt 3.73 posi
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