I love a custom as much as the next person, but a first boat with a radical transformation from OB to I/O is a major project to say the least. Let's assume you have the time, skill, and money to complete the build I'm afraid the project may not handle as well as it could if left closer to stock. Yeah a 150 is a bit much, but I had a 16 deluxe with Johnson v6-175. Took it out once, ran hard but barely under control. Best advice I could give ya, clean this one up and enjoy it, or sell it and find a craft with the basic set up your after.