318 Identification

Wow, a 1968 model year car built on September 19, 1968 is very, very, very late build car! Others with 68 model year cars would know better but I don’t think Chrysler started adding the last few digits of the car VIN to the engine block until part way through 1968 production and even then it might have varied depending on the production plant? The fact your block was built very early in the 1968 model year production and the car was built very very late is a head scratcher for sure.