440 m code block

Hey guys, I am looking for some info on m code 440 block, my info shows that after january 1969, just the last 8 of VIN, is stamped on block on all m codes. Others say the entire VIN should be on block. Can anybody help with this? I am trying to see if I have a true numbers matching block. Also has anyone seen the holes drilled in the oil pump housing off center like mine. As always any help will be appreciated

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