Checked the speedo by gps today. At an indicated 70 mph (3000 rpm), the gps read 75.6 mph. I was thinking (by doing the math anyway) that the 4.30 gears would get me almost back to stock gearing, but it appears not. Before the 4.30 gears, I ran 2700 rpm at an indicated 70 mph-did not check the speedo by gps then, but by math that would have been about 78 mph. Any thoughts, is this right?

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