It's a Cat, 3208 engine. It was considered a "throw away" engine when it was released, as was the B when it was released. Parent bore block.....no liners. They are repairable if something happens cylinder wise. Lots of those were running around back in the day, My Dad and Grandfather were some of the first out this way to have repair sleeves made and repair them. 600 ish cu in, developed in a partnership with Ford, that's why there were ALOT of them in the Ford C series cab overs, 210 hp most likely. IIRC they were also 325 or 375 and a 425, I think
I think I stand corrected, after looking looks like a "fuel Squeezer' Detroit, the valve covers are tall and I don't see the nozzles and lines. 500 ish cid.