Ok, I'm in the process of parting out a basket case 56 F-350 and I'm trying to figure out what the rear axle is. I'm pretty sure it isnt the original. I'm thinking maybe a Dana of some sort? It is a dually with 6 lug. Trying to figure out if its worth trying to save

 

Looks like the squared axle housings Timken under my F350. Save the wheels.

 

I was planning on saving the rims (unfortunately only have 4). thanks for the input on the axle, I'm use to the older split type timkens, didn't know they made a style like this. The engine/tranny in this truck are from a later model, wasnt sure if they swapped axle too

 

Here's a better shot of those tags.

 

Timken model B100 = 1956/58 F350 (Y in parts catalog pic).

All 1953/66 F350's have 6 lug wheels on a 7.25" bolt circle.