well the only thing that i will add is your engine is a very good running engine in your boat the 330 hp are not to bad when they are using small port heads with stock size valves and small cam and all cast iron heads intake crank .. parts.and cast pistons . if you pull a part one there is no trick parts that i think speak volumes on just how good the 454 big block is in stock form .i think they build them to keep them down around 4600. that keeps them happy and well live long