Hunter installed sidepower last time I checked.There are several models that all have the same tunnel diameter. The difference therefore will be weight of the unit, horsepower & $$$.I would expect that you would want either 6 or 8 hp for that boat. I believe that several years ago, Hunter was installing a 4hp unit. Given the small weight and price differential, I would go with something larger.The Hunter owners manual likely has specs showing exactly where the unit is installed at the factory. Get a reputable yard a copy of the relevant pages, have them inspect the boat and tell you if they can do the work. I would not expect Hunter to be of much help other than providing current spec information as they are not in the business of retrofitting bow thrusters. Here in Southern Ontario, the marina that we keep our boat at seems to be installing several retro bow thrusters per year into sail and power boats.Warren Feldstein