According to my Ford Parts Book, B-3010 as 32-36 Axle while A-3010 is 28-31. However it looks like a Model A Axle. If the thickness of the pads where the wishbone attaches to the axle is 2 1/4 in. it is a Model A. '32-'36 used a 2 in. thick pad.
Interesting stuff.
Chris
The thickness of...