I did a quick recon on the axles to see if I could ID them.  From the shape I think they are Dana 30 axles.  The front axle has some numbers stamped on it but they are badly rusted.  The back is a little better.  I found this stamped on the axle tube:

I have no idea what that means.  I will have to research this and see.  I kinda was hoping for a part number but that does match up.