This is what I found:
On the front of the differential housing are the stamped numbers: 331 and below that number is 1141544-42.
The overall length of the axle, tip to tip, is 63.25 inches with 59.25" outside drum hub to outside drum hub.
It does have hydraulic brakes.
The differential housing measures 8 inches in diameter.
It is the brake assembly I need to replace. Than you.