History Farm dump trailer made from early Ford parts

Thought some of y'all might find this interesting, got it home last week, been sitting in a barn since 1976. Any idea of year of axle? Has round back spindles, welded to axle, and spring mounts have been torched off wishbone. Hubs have 5 on 4.5" bolt pattern, I think the 16" wheels are shoebox era, the tires are 7.00-16 military with 1953 date codes. My grandfather built this in the early 60s when these parts were common in junkyards

 

I bet the axle, wishbones and spindles are 1937 through 1940.

 

That's one of them rare 16'' '49 Ford wheels.

 

mopar axle petty sure.....have some of those shoebox 16" wheels...

 

Alchemy is correct 37 to 40 axle, same wishbone with the spring hangers cut off