Looking for a good builder/supplier for a 400-425 HP 383 SB chevy. The old 350 has finally given up the ghost (22 yrs). Plans are to convert the Panther with a conversion kit to a Berkley style. The boat is a 23 ft Day cruiser so I will never be super fast but I hear that an additional 15 to 20 MPH is possible. Anyway do a lot of travel so time at home on the boat is at a premimum. Hate to pay someone else to do something I can do, just do not want to take 3 to 4 months to do. Anyone out there have any recommendations for a builder/supplier.