Wagz did his 744.4rwhp on a stock motor (albeit swain coated), and I remember a guy doing 751rwhp on a stock long block. Sure, you can't tap the full potential of the Sport 700's on a worn stock engine, but that doesn't mean they won't work. My GT2530's are currently on a stock engine. (I just don't want you thinking that you couldn't do it if you wanted to.)
I love elitists who aren't really elite in any way... they amuse me greatly.