29 Fountain can be ordered with twins
280zx and zxo Donzi twins up to 377 Scorpions, but they need 92 Octane and props rotate in so you loose a lot of effect when docking.
28 0r 29 Powerquest
Seems hard for that short a boat to handle the weight of twins-got more power but sluggish-Look at the time to plane times. Out in big water like the gulf of Great lakes-the back up of two would be nice. Inland-help is usually nearby. Boats, like race cars, have a critical balance for optimum ride and performance