Help us ID this Perkins engine please. Big pics inside...

I posted this in the Massey forum but I need more views.

Full backstory, I have a friend who pulled this "supposedly" new Massey Perkins engine block out of a scrap pile. It has a 3.875" bore, possibly making it a 4.236. Mains are installed on the block.

He says it was mixed in with a bunch of red harvester sheet metal parts, etc., so that's why he's assuming it's a Massey Perkins. I can't find an image of a similarly casted 4.236, especially with that tappet cover, or any other Perkins for that matter. I haven't seen the same casting number either.

I'm starting to doubt it's Massey Perkins, and I scraped the black coating (cosmoline?) and some of that red primer off in normal Perkins block stamping locations and there are no numbers to be found. So all we're left with is the casting number, 37112440 and the possible date casting 26 K 64. I think it could possibly be a Fiat/Hesston, or some random model that had a special application, or someone's copy of a Perkins? I don't know, so that's why I need y'all's wisdom. Thanks in advance.

Here's the link of the album of pics: https://imgur.com/a/42tHTte



And let's see if I can get them to show up here:

My guess is it's a Perkins industrial block, as it does not have the idler gear for a balancer on the font main cap that tractors use. Some Perkins industrial 236 and 248 blocks did not use a balancer.

On the 3rd picture by the number 2 main cap, what number is stamped into oil pan rail on the camshaft side.

I believe it's PK208. 208 is also stamped on the boss of each main.

Ok, I had him go out and scrape it off and recheck the stamp next to the #2 main on the pan flange.

It reads:

PT
9K208

Well that number didn't help any. From looking at various 4.236 engine blocks Perkins did make some totally blocks using 4.236 internals. I did find some that looked kind of close, but not exactly like that one. I think it's a non-stress block, and from the first picture with the big "window" on the side of the block other Perkins marine engines have a "window" that is something like that. Why the MF dealer had it, probably used all the internal parts in another block would be my guess.

Could be... But he's only thinking it's Massey because there was red sheet metal around it. Nothing said Massey on it, and he pulled it from a scrap pile at the junkyard. I agree it's a non-stress block, but I'm leaning towards industrial or marine at this point. I really have no clue.