Top speed became less relavant to me with the advent of the overdrive transmission. I can have a ring and pinion ratio of 4.10:1 have 33" tires and still cruise 75mph at under 2500rpm.

Drop the transmission down into direct drive 1:1 ratio, you know the "high" gear of the glorious C6 Ford used for so long, and my engine speeds up over 25%. Back in the C6 days, 4.10 ring and pinions seemed to be associated with "rock-crawling" and "mud-boggin'." Ha! My how the times have changed.

We're about to dawn a new age with double overdrive...