I found a higher ratio rear end for my '56 Victoria from one of the members here on y-blocks forever.  Doing some research to find out what my current ratio is (V-8 automatic as originally purchased) there was a statement made on another website that the '56 exclusively had fine spline for their axle shafts.  I have never heard such a thing before.  I made a call to a knowledgeable friend and he said that statement is "hogwash".

OK, guys.  I know you know the answer.   Does the '56 have different splines on their axles?