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Re: 3.23's to 3.73 08 4.3L
I had 285s and 3.73s on my old scsb 4x4 with a 4.3. It was a complete dog. id go 4.10s so the 4.3 can keep up at highway speeds, mine was always hunting between gears going 65-75. and it would go 90mph tops(took about a week to get there too)
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