I got myself in a bit of a bind. The 3.8 Series II in my 1998 GT needs to be replaced, and i got a parts car from a friend. Said parts car was "supposed" to be a 2001 with a 3.8 Series II in it, it was delivered to my house while I was at work, and turned out being a 2001 SE with the 3.1 in it. Imagine my face when I saw the engine....... I was wondering, what would I all have to do to swap the 3.1 into my 1998 GT. Just the motor, or would i be stuck doing a complete swap including the computer? The parts car is fully intact, excluding front body parts that were used to repair another SE I assume. Any help, input, or comments would be greatly appreciated. Otherwise, I am going to try trading the parts car to a local Auto Salvage yard for a 1998 Buick regal 3.8 motor(106,407 miles), that they have listed in inventory for $499.99.