has anyone done this? I'd love to have the V8, but can't trade in my LS. I'd rather keep the one I have and drop the 3.9L in. SO, what all would I have to swap for it to work. I did a search, but didn't find it. Is it as simple as swap motor, computer, wiring harnesses, headers, maybe motor mounts...what else? Are the transmissions the same? It would just be cheaper and funner to do the motor swap than to buy a whole new car. Thanks for any info.