OMG I wish people who didn't know anything wouldn't post stuff like "nope it won't fit, there isn't such a thing as a 3.2 only a 3.3".......there are 2 generations of Intrepids, the newer ones ditched the old motors and were available with either a 2.7, 3.2 or 3.5/3.5HO.
YES a 3.2 can be EASILY swapped with a 3.5 (the engine that CAME in my Intrepid), not sure if you need to change anything else but the engines are basically identical except for the displacement)
www.dodgeintrepid.net for more info