If you want to play with the big dogs dont bother trying to go all motor on a ls. Save your money for a turbo kit. While you are saving, read up about it and by the time you have some moeny set aside, maybe you can make a custom kit. #1 rule of building motors is have a goal and a plan on how to get there. You rush into things, you're going to end up with a bunch of stuff you dont need anymore and will have to sell a big loss.