No, it won't match the vin --- that number is an "engine build sequence" number that was used in the plant. I don't recall for sure if the PHS doc will have it, check with them.
If you look down lower on the same side of the motor, next to the edge of the timing cover, you should find another string of digits - running up and down. This number will match to your VIN if it's the original engine. I think the factories started stamping the partial VIN on blocks starting in late 1967.