The a-frame(?), suspension and disc brakes are from a later model truck. He wasn't sure what year though?
Someone mentioned that it has a wrap around windsheild so it was a '62?
Like I said, I don't know anything about this vintage of truck.
As soon as I saw this on his property the gears started grinding in my head:
"I could sell the 2wd K5 I already have, get rid of the deisel, ......"