warranty replacement block clarification

I need facts regarding warranty block information please.
A 1969 Dodge Charger has an 4-24-69 built date and the 440 engine has a warranty block that has specific markings either deleted or added (compared to original engine).
1. The "pad" does not have "HP" stamped on it.
Question: Did warranty blocks have the "HP" stamped on the pad or not?
2. The "pad" does have "440 S" stamped on it.
Question: Does the "S" stand for "special" or "service"?
3. The date molded into the side of the block is: 5-22-69
Question: Does anyone else have a warranty block that has a date that is one (or so) months after the built date of the actual car? It makes sense that the date on the warranty block would be a later date of the actual built date of the car.
4. There is no "vin" stamped on the pan rail.
Comment: The machined surface on the pan rail has no numbers or letters stamped on it.
Please provide factual information. Thanks for clarification.

Funny you ask...I was just talking about some of this stuff with my uncle's buddy who is a retired chrysler mechanic and a real wealth of Mopar knowledge. I can't address all your questions but he said that the 'S' meant 'Service' and would be stamped by the dealer's grunt that actually installed the engine. There is no way to tell a real 'warranty' block from a 'replacement block' as the factory built replacement engines for either for warranty coverage, or if the customer was paying for it for whatever reason(like if you blew it up racing after the warranty period) The build dates of these engines can be anything as they had to have some on hand and you got what they gave you, in other words it could have been built before your car was built as they didn't care about keeping your car 'date correct'. It would depend on when the engine was actually replaced.

I believe warranty blocks should have a sheet metal plate riveted to the block.

I think there are different locations for big blocks, but I have two 318 warranty blocks and the tag is riveted to the block to the left of the water pump.

...or evidence of that tag having been there.

There is only one FACT with Mopar: nothing was 100% standard, logical, uniform, traceable, documented, etc. etc.

With your block I would figure it would be "S440" (instead of "440S") and have a "WT" or "TW" as well, so it would be nice to see a photo of the pad for variations. No "HP".

Ditto B-head and YY1:
If it still has the tag (or tag hole) that means it was really replaced under warranty, but unless you have original paperwork from the dealer, it could have been installed in any car prior to yours. Lacking those, it's more than likely just an over-the-counter block.

Block casting dates could be anything, because as blocks were pulled they didn't search for the oldest date, they picked whatever was in front of them. But if choosing, a later casting date than SPD won't raise questions with numbers guys.