[CivicSpoon]

You'll either need to buy the mount or cut and reweld; one of the other. You're planning on pushing 5-600hp? Why don't you start with at least a gsr motor then, i mean the LS is boost friendly but not that much boost (probably 30-40lbs) with stock internals (I'm assuming you already know that). But you'd be better off building up at least a gsr with it's already 170-180 hp if you're planning on doing that much. But still that's going to be one hell of an expensive build up man, hope you've got a ton of cash to blow; cause if you don't then stop dreaming. You're going to have to bullet proof your short block and do quite a bit of head work to handle that much let alone be able to use the power.