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Old 05-06-2008, 08:55 PM   #8
Bob E
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Join Date: Feb 2006
Location: OKC, Ok.
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Try running 68-70,...of course a headwind, hills, & running on interstate hwy's (vs 2-lane roads) are all going to have an effect. You might also check & see what rearend gear ratio you have. Most truck conversions were spec'd out to haul "monster" stacker trailers full of iron, therefore came with lower geared rearends.
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