Are the EGR cars of that generation only as of 2003 models ? To me it seems they had no EGR at the start of that generation but added it in 2003. Yes ?    Can I take a non EGR engine and  easily drill and tap the EGR in ?    Or can I use the non EGR engine and also swap the computer and harness ?    There’s a 124k 2000 or 2001 wagon that is needing a front clip but I’d rather not do all that work and just use that engine in my 2003.