That number that is stamped on the front of the block is a production number, and is always different from the vin number. They were NEVER EVER the same number. They did not start doing the vin number on blocks until much later. If you find a car where that number matches the vin number, then for sure it is -NOT- the original engine.
There is a lot of information available on the internet, that is incorrect. Don't believe every thing that you read. Ask some one who was around in the 60's and 70's, and actually worked on these cars. They will tell you that in fact that numbers did not match from the factory, on many cars. PHS tells you what was supposed to be put in that car, however in some instances cars were assembled with the wrong motor in them. They never ever shut down the assembly line, and they used what ever engine they had available that day. Matching numbers did not become important to any one, until the early 80's.
Last edited by robertcollins; 06-09-2016 at 01:53 PM.