Earl,
Do you have an open or posi rear end. Cars rear end I mean.
You should just have to turn the wheel one turn and count the drive line turns. CobraEd is correct as two turns would equate to about 1.9 drive shaft revolutions per wheel turn. So you must have the higher gears. In 1964 Ford used mainly 3:00 - 350 gears in the Galaxies, so you can see that yours are somewhat high. The lighter car helps though.
Ron