I am soon going to be swapping the 3.1 in my 2001 GP for a 3.8 Series II. I 'm starting from scratch on the project and it seems pretty "simple". As far as I can tell so far I can use the transmission from the 3.1. I know I'll have to get an ECM and engine wiring harness for the 3.8. Is that really all there is to it? Just wondering if I'm missing anything important. Do I need the 3.8 mounts and will they bolt on where the 3.1 mounts are?