I know this is an old post but no one is answering to my thread. I could really use some help in this department. I did the opposite swap. I wrecked my 2006 2.8 so I got a 2004 3.6. Long story short we got the 3.6 going but ended up snapping a bolt off in the block and cant get it out. So we went ahead and dropped the 2.8 in it. I even swapped the ecm with it. I got crank but no start. I'm getting fuel and am checking for spark now. What issues did you run into? Thanks in advance.