All, I'm currently working on swapping out the ecotec with an LS1. I know that it's already been done several times (mallett, werks, archie, etc.). However, there seems to be some missing information as far as how it's done (i.e. wiring harness, radiator specs, engine mounts, clearances, etc.). You can check out my progress here, http://www.cardomain.com/ride/2637766. I'm really just interested in getting all the details about the swap in one place. So, if anyone has any questions, please feel free, likewise if you have any suggestions/advice, don't hesitate.