Well, seems to me that it ain't natural for an engine to be produced after the car is built, so I would say before.
The engine's assembly date is part of the Engine ID Number, stamped into a machined pad in various places on the front of the engine, depending on the engine family.
R.
Sorry. Yes two months before hand.
The engine build dates stamped based on family. Small blocks are below the drives side head, big blocks are usually on the ID pad near the distributor, and HEMIs are on the oil pan surface at the back of the block on the passenger side.
The closest date as to when your car was made is probably the date on the front of the K member.
