It would have been a Challenger.

Both cars were likely scheduled for a mid-February build, but there is no way to know when either was actually built.

The engines & transmissions were stamped right before the matching body was lowered onto them.

These two cars may have been one right after the other on the assembly line & the worker doing the stamps simply neglected to roll the digits to the correct numbers the first time.

We may never know for sure, but I do not see any evidence of fraud on this one.