440 m code block

The very early M code cars came with the full vin. I run the 440 M code Cuda registry and I have some of the 440 M code Dart list.
So do you think that since it a march twenty nine SPD, ( I would say that it a middle of the year car) .that is safe to say that it is original block. I am going to ask to see his supposedly 3/29 car fender tag to compare with mine. As far as the motor mount holes being off center, I say it is just poor mopar production fit like always.