[Rev]

Fordkid68, it just occured to me that you can find out what your car came with originally by looking at the data plate on the drivers side door. It should have an axle code on it.

For '68 open axles:
1=2.75
2=2.79
3=nothing
4=2.83
5=3.00
6=3.20
7=3.25
8=3.50
9=3.10

For '68 Traction-Locks
E=3.00
F=3.20
G=3.25
H=3.50

Rev