Date code question

I know some couldn't care less about date codes and number matching but this is more a curiosity than anything else. When numbers were stamped into a block, transmission, fender tag, or anything else for that matter, when was it done? When the block was first starting the machining process or when the engine is complete and ready to install? Same with the fender tag....when the unibody is just starting on the line or when it's getting the final inspection? Anyone know for sure? One reason I'm asking is: Can an engine build date be one day after a fender tag build date? Maybe the engine was built late one day and installed in a car early the next day or are all the engine build dates the same day as it's car or maybe many days before the car build date?
Author: admin

Date code question

I know some couldn't care less about date codes and number matching but this is more a curiosity than anything else. When numbers were stamped into a block, transmission, fender tag, or anything else for that matter, when was it done? When the block was first starting the machining process or when the engine is complete and ready to install? Same with the fender tag....when the unibody is just starting on the line or when it's getting the final inspection? Anyone know for sure? One reason I'm asking is: Can an engine build date be one day after a fender tag build date? Maybe the engine was built late one day and installed in a car early the next day or are all the engine build dates the same day as it's car or maybe many days before the car build date?
Author: admin