360 HP Confusion. History of this motor?

Hoping someone can shed some light on a confusing (to me) motor.

Numbers on the front of the block are 0W360HP0211 and a big weird stamp of 4097. So, 1980 model 360 HP built in the Winsor plant. I expected to see a Julian date after HP, but 0211 makes not sense so I am assuming that is the 211th motor built that day and there is no Julian date.

Casting number is 4179930-360-2 with a casting date of 3-5-79. Bearings show a date of 4-79.

VIN stamp says AA135520.

Cylinder heads are 4071051.

Really not sure what the motor would have come out of. With the HP stamp I though it might be a E58 motor but the VIN stamp should have be 0_135520 or something, right? Best I can figure, trucks and vans used A for model year 1980 designation so maybe its a truck or van motor? The LRE stopped after 1979 so don't think it was that, but did they put HP motors in either a van or truck in 1980? I think the guy I got it from said it came out of his van. I assumed it had been swapped in but now I'm not sure.

And why is it stamped as a 1980 motor when it was cast and assembled in early 1979? Maybe it was assembled and then didn't find a home until the 1980 MY? And the stampings on the front of the motor are done closer to when the motor is installed instead of when it is assembled?

It does have a double roller timing chain and had a windage tray, too so it makes sense it was an HP motor. No idea on induction, couldn't tell you if it had a 4bbl on it when I got it (been too long).

I bought this motor years ago (like 22+) after seeing it in the back of the trailer with some trash. Didn't really have any plans for it, and it's been long enough that I don't remember if I got anything off the motor either. At some point I stuffed it in the back of a storage unit where it rested for most (all?) of those 22+ years until recently when it came home after getting my garage built. Tore it apart last night (was seized up) and got curious about what I had.

Any Sherlock Holmes out there able to garner any info from the above?

I looked around and found zero info on vans and such in 1980 so figured I would ask the question here.