Technical steering box ID ?

got this box at swap meet ,thought it was a F-1 ,but after i ordered what I thought was a F-1 pitman arm it doesn't fit. Box sector splines has usual 4 flats at 90 deg. and is 1.184" at start ,arm is 1.050" at start.
any clue as to what box we have ?

 

5 ton.

 

How difficult is it to find a arm for this box ? Thanks,gus.

 

The box is about 20% bigger than the smallet one. I know in most cases the engine and exhaust clearance won't allow this box.
I was in the same boat as you and I found a guy in the Midwest selling used Ford truck parts. I think it was about $60. I found him with Google. I wound up with an f100. Good luck.

 

I can't see any photos.

 

Strange, works good here .... try this.

 

Works now. Probably this internet connection.

 

Maybe from an F-2 , F-3 ?


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