I have seen a 350 twin turbo run out pretty good.....Your right they sure don't strike much fear by their sound, his sounds very mild but when he spools up on the line it screams off the line. He even runs mufflers to create some extra back pressure I guess. Only downside I saw was if you don't get to the line first your screwed, if you get your yellow lights and your second on the line you don't have enough time to get spooled up to launch. Everything i have seen turbo'd has been small block stuff, Is it because there better to turbo than big blocks? Seems small blocks have turbos and the big blocks stick to SC.