I just got a 1989 stratos 201 pro that I know nothing about..From what I understand it 20.2 feet long.. I'm not use to a boat this big,,I'm use to 16 to 18ft boat with a max hp of 90hp..I was wondering what's the least and max hp I can put on this boat..I'm not looking to go very fast..I want to stay around 45 to 50 mph max, but I do have to get the phone on plane..does anyone have any ideas..