I was thinking about milling the set of y303s (aluminum gt40s) so that im about 10.5 to 1. Is this worth doing? It will be with whats in my signiture plus a performer intake and 65 throttle body. Are ther any drawbacks to doing this on a car besides typical stuff like high octane and no blower/turbo? Im hoping that the additional compression will bolster the power band a bit maybe like 10-15 hp and tq. What do you guys think?