I do not know of any kits for this. Does the boat have any components for shore power, plug, breaker panel, breakers, ...?
If no shore power does it have any A/C equipment, batter charger, microwave, ?
Also where in the world are you? U.S. or oversees determines what is required.
1997 2400 SCR
5.7 Vortec / Bravo 2