Chuck,
I don't have measurements but I can tell you it depends on the axle model. Such as: If a wagon and truck each have a model 44 rear end they are the same measurement. If they each have a model 41...They are the same measurement. Here are some listings I have:
Rear axles for 4WD:
Model 41 = Wagon 4X4 (1949 -1950)
Model 44 = Wagon 4X4 (1950 - 1964)
Delivery 4X4 (1953 - 1964)
Model 53 = Truck 4WD (1952 - 1964)
Timken = Truck (1947 - 1955)
Front axle all 4X4
Model 25