Man...I would stray away from this thought....No one has ever "down swapped" a 3.0 to 2.5....Might be some problems..Problems that NO ONE knows of. The warranty will be toast on the escape and it will have less power. Why would you do that?? You also would have 2 cars down...and what if something happens and one or both and they are down for a long time? You can pick up a new 3.0 for around a grand...do that and save yourself a HUGE hassle!