It's always been my understanding that the Manual should have the lower gear set it in, since most of the time the 5-6spds have a higher OD gear in it. I have 3.73 in mine, and wouldn't go any higher, I still do a lot of highway driving in my car. I know some people in this area that got more perf. from 4.10 4.30 in 5-Spd (Still good highway MPG) than the 3.55/3.73 in the same tranny.
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// 1998 GT-Steeda Conversion \\ -- Sold
// Now own 2001 F-150 SuperCrew 5.4L \\
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