Axle vintage ID (1 Viewer)

[FJmaine]

Is there a way to determine what year axle this is? I have an old matching set, front and rear. I was told late 60's, but that was all the information that I got. Could I use this rear axle on a '78?

 

[Marn0]

it will probably have coarse spline axles but if you are swapping the whole thing that wont matter. Flange could be different to later model tailshaft.
Check the ratio is the same

 

[69LC]

Can you push the axle shafts inward at all to check the splines at the spider gears? My early/mid 69 had fine spline rears.