RobertN - You'd better be sitting down: I've got 3.07 gears in my Dodge, with 33" tires.
I can run 70 mph in 6th gear at 1700 rpm - it's obviously too tall a gear for pulling more than 5k or so, but it sure works great for running empty. And in 5th (direct), it'll run 70 at 2200, so I can tow just fine, even on the Interstate, in that gear.
MarkC
BTW, if you need a spreadsheet with those formulas in it, I've got one I made up for my Dodge.<P ID="edit"><FONT SIZE=-1>
Edited by MChalkley on 9/6/00 09:58 PM.</FONT></P>