Lumber',
Yes, that date code translates to May 23rd, 1959. The stamped engine number ending in K indicates it was a Thriftmaster 235, truck block, yes. The '848 head casting is consistent with that as original fitment, although that was the common 235 head from '56-'62/63, so it's hard to say if that is original. But it is "correct" for that engine. There is a date code cast in the head, but the valve cover needs to be removed to see it (about 2/3s of the way back on the driver's side of the head, under the V/C).
Doug
Last edited by drdoug; 12/18/2020 2:17 AM.