numbers matching ?

What is the norm for time between the date on the motor to the date of the car being built? The reason I`m asking is my motor for my car is cast on 5-27-69 the car was to be built on 12-02-69 the sticker on the drivers door say 11-1969 the motor according to the numbers on the front of the block say it was assembled on 6-27-69 yet the VIN is stamped on the pad on the block.

I know things can happen but this seems abit to far apart to me what is your guy`s take?