Technical Spindle identification

Could someone help me identify this spindle? Kingpin is 5.5 inches long and circumference is .813. Boss length is 2.250. This doesn't match any identification charts I have looked at.

 

'64-'70 Chevy G10 van, I have them on my '40.

 

Would you happen to know the kingpin circumference and boss length?

 

It looks like the front axle may be homemade using the ends from the Chevy I beam axle.

 

Could someone let me know if there a disc brake conversion for the spindles that I have?

 

Are you sure you measured the circumference not the dimeter? Definitely not Ford

 

Chev truck parts. They came off this:

As @Blairsville G pointed out.

 

Google this: 1964 - 1970 Chev G10 disc brake conversion

 

I miked across the kingpin

 

Circumference = diameter x pi.
Where pi = 3.1415.