30-31 ford front axle question

Found an axle for sale...the seller says its from a 1930-31 Model AA Ford truck. Is this the same axle that would be used for a regular 30-31 model A car? If not what are the differences?

 

I ain't sure on this, but----I'm thinking the AA series axle has thicker perch-bolt bosses and a deeper/wider cross section to the beam axle than the cars and roadster pickups.

 

the truck axle is much beefier than the car one...king pins might be different, too...johnnyb

 

I didnt think that the "heavy" axle came out till 32, not alot of thoes around