yes may sound stupid but if your wanting to stay 6cyl... might as well get that extra 7hp plus if im not mistaken the 4.2's are alot more torque then the 3.8s and they cost right around the same price... i was just stating the swap because i thought it would be just for a qucik dd swap... but if your really wanting to actually do something and you have the time and the money 5.4 swaps the way to go...