My Model A has a 58-64 rear axle housing, I swapped out the 3:70 posi for a 3:08 non-posi. The LH (driver side) axle shaft is now about 1" too long, what different size shafts are available and from whom.
Put the wrong axle in first did ya? If you did, look at like this. You answered your own question and you learned from it.