While I can't answer your question directly, I can say that any boat with twin engines that are properly propped will be highly unlikely to plane on one engine. And if you do manage to get the boat up on plane, you are probably overloading that engine significantly.
You would need to have a set of lower pitch props so you could change the prop on the operable engine in order to plane the boat.
Having said that, you will likely hear from folks with twins that total max HP for the boat who will state that they can plane on one engine.
JMHO,
Brian