FROM WHAT I'VE READ AND SEEN, YOU WILL HAVE MORE HORSE POWER THAN YOU NEED ON THE STREET. BUT YOU WILL HAVE A LOT OF BRAGGING RIGHTS. A 390 WITH ALUM INTAKE AND HEADS, MILD CAM WILL GIVE YOU 450 HP + - . SPEND A LOT OF MONEY ON SOME GOOD LARGE REAR TIRES!!