The "engine number"??? If you are asking "can I put the engine from another crossfire in my car without changing the computer crap?", then the answer is this:

If you are not changing from N/A (Limited, Base) to SRT (with supercharger), then there is no concern. An M112 engine, in an M112 engine - the ECM only knows what's going on based on sensor inputs from the engine - not on any serial number/VIN interface.