Just a quick question; is this doable? Have a 2004 classic with a bad powerplant, and the availability of a decent running 2.4 out of a 2012. Is this a doable swap? Have any of you done it or know of it being done?
If you have deep enough pockets, then anything's possible.
The problem with swapping engines in any modern vehicle is the electronics needed to make it run right. You would save a lot of money and effort if you were to replace it with an engine that'll just directly drop in.