Thanks for the detailed response! After a little more research I was able to find out more specifics, including the added cost of making the LS3 work. I think it comes to an extra $1,500 or so on top of the cost of the engine. I think I'll stick with my LS1/T56 pull out for now just so I can get the car converted to LS power. Then I might get a maggie TVS if I need the extra HP. This way, when the LS1 goes out, I can always use the maggie. It should fit an LS3 right???