1970 Z-28 Engine numbers

[jvpcamaro83-87]

I have a one owner 1970 Z-28 I purchased from the owner that passed away a year ago he owned the car for 53 years. All of the numbers appear to be correct rear end, trans, muncie M21 housing, and the data plate. I was looking for the vin # on the engine block, I do have a front pad number that is VO 324CTB and that appears to be correct because the car was built the 2nd week of April. The rear end also has a 03 24 date that is correct. The car is a Norwood car and I cannot find any #s that coincide with the vin # near the oil filter, the only numbers I can find in that area are raised numbers 371 and then below that 386 and further under that appears 116 with the letter N next to that but two inches to the right. Those #'s do not coincide with any of my vin #. Is there any other place a vin # would be on the engine. The POP plate has the VO 324CTB on it along with the rear end numbers COZ0323G. I truly believe it's the original motor due to the mileage and history but just want to confirm when I sell the vehicle. Thank you