Roger you’re right about the RPM, running it thru the calculator it’s only about a 200 RPM difference.

The real reason for the change is after seeing my wife on a slick street with a posi rear end I can assure you it is not a pretty sight.

I have both 3.0 and 2.79 open chucks so I figure I might as well go with the highest ratio (as far as I know 2.79 is the highest ford made for the 8” ....otherwise I throw in something like a 2.4-2.5 especially with the short tires.



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