Fun, your boat would do the same thing as would mine.
Federal boat safety standards are limited in scope. For example, maximum horsepower, persons and weight capacities and flotation requirements apply only to boats under 20 feet.
Your fountain would sink like a rock and my understanding is some have, there was a lawsuit a few years back on I believe a 32 with big blocks.
In my uneducated opinin the reason race boats float sometimes is that 1) lighter lay up 2) no weight in the cabin to speak of 3) no deck hatch to let air escape 4) some added flotation (guessing)