If you’re thinking about something new and different for this summer, take a look at the King Hell Attitude 17 sport runabout, a retro-looking wooden vessel with a Harley-Davidson engine and motorcycle seats and handlebars. There’s only one is existence so far, but Chris Ashley, the King Hell’s builder and designer, is more than ready to make some more. Ashely (pictured at top) grew up messing around with boats in his grandparents’ home in Nantucket; he bought his first restoration project, a 1952 Chris-Craft, when he graduated from Cornell. Over the years, working from his home in Harvard, Massachusetts, Ashley…