Need help decoding numbers on HEMI block and pad.

I have a 1971 Challenger with a 472 HEMI crate engine and would like help deciphering the numbers found on the engine block. Specifically:

Yellow sticker on right (passenger) side of block: P/N P5249666, S/N 209392 assembled in Canada by Cummins
2468330-M followed by 7J23 on right (passenger) side of block,
Block pad above water pump and toward left (driver) side of engine: 472, H2214 242 (upside down when viewed from front of engine)

Originally, this car had a 318 ci engine and 727...

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