TOMMY 22 SCARAB

Good day gentlemen, i live in the hampton roads area and i have a 1997 22 foot scrab, it has a 454 mag completly stock and i would like to add somemore power to it without going in to the motor real hard. Do anyone know someone who knows what they are doing and wont rob you blind and knows what he is doing and what is the soluction to a little more power. Thanks for any in put.