I blew the engine in my 2003 blazer it’s is a vin x what would I need to do to swap it with a vin w engine?

 

Change intake manifolds (2003 has no EGR). If vin W is 1996-2000, you will also need to deal with mounting of different knock sensor that is on your 2003. Otherwise the 2001-2002 vin W has the the same knock sensor.