The Standard issue front axle rated at 5000 pounds had 14 x 2.5 brake drums, the optional 7000 axle has 15 x 3 drums.
The third leaf down from the top of the Main Spring pack will have turned down ends that hook the hanger pins. The bottom leaf has an eye and is pined to the front hanger, this is used to locate the springs and is called a radius rod or torque arm.
The Main Springs are just the springs that go through the frame hangers. The Aux Springs are on top of the Main and they contact frame brackets when the truck is loaded. So, I'm betting you have 10 Main and 4 Aux Springs...
How wide are the springs??? 2.5" or 3" ???
Also, look at the axle casting number again, you're missing a number I think...should start with a 2 or 3 and be seven digits.
Mike B
