340 block Vin #

Hi Guys Looking for some info on 340 vin stamping on Blocks I got a Guy telling me he has my block for my car. The Vin Numbers are right But Not all are perfectly straight and some are deeper than others Do You Think this is factory. And what does yours look like
This is my numbers matching '72 340 block. The numbers look some what hand stamped individually. Not a replacement block.

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