OP, did you ever sort this out?
I recently purchased a 2004 FXT with an EJ20X (I believe). The swap was done by Ecotech in St. Louis. They may be able to help you out if you have any questions regarding it.
There is a plethora of these EJ20Xs out there and it seems that it's becoming a more popular swap option due to it's price point.
Unfortunately the FXT is emitting white smoke out of the exhaust, so something is going on there.
Thank you for the info SlammedSix. Good stuff.