I just bought my dream car, 03 cobra. The car already has lowering springs, 2.8 pulley, magnaflow catback, bassani off road X, JLT cold air and a canned diablo sport tune. The car runs real good now but just curious what you guys think would be the most efficient way to hit 500+ on pump gas, and be real reliable and streetable.. Keeping the factory eaton would be a plus but Im curious what you all think..