If there was a such thing as a 410 aluminum Toyota you would probably be on to something, but they don't exist and probably won't ever exist. And sure, Brian Tyler has won 2 of the last 3 in the SC and would have probably won Iowa pavement as well had a clutch failure not got in the way, but dirt-mile race tracks are black slick places that (and eventually lay rubber) and depend on lots of factors. Maybe its the engine, but maybe its the drivers throttle control, experience, setup, and a different brand of tire?