why not take the turbos out and the air pump then put a supercharger in its place just find one capable of producing the boost and cfms of the stock turbos when both are operating this would allow low end power and good mid / high end power maybe a jackson racing supercharger would do and take a tube weld it to a adapter to connect to the super charger outlet.............no back pressure, less heat under hood, can completely take out all the vacumm hoses,
just my 2 cents