SO IS IT SUPERCHARGED OR TURBO UR RUNNING WITH NOS TO GET 900 HP.....A 383 IS A STRONG ENGINE WITHOUT THE APROX. 50 HP GAIN FROM THE ALUMINUM HEADS AND THE BLOCK ADDS NOTHING EXCEPT SHAVES WEIGHT BUT I HAVE A BUILT STROKER TOO AND ITS NOT POSSIBLE TO GET THAT KIND OF POWER WITHOUT FORCED INDUCTION AND NITRIOUS,MAYBE TWIN TURBOS BUT THEY WOULD HAVE TO BE HUGE!