There have been several threads about axle ratios, engine speed, and road speed over the years. One thread that had lots of discussion is this one:
https://fordbarn.com/forum/showthrea...5747&showall=1
For quick reference in this thread see the table below. Since this table is probably not easy to read in this forum I have also attached this as a pdf, which you can download for easier viewing. All these ratios are for 28 inch tall tires.
