64Tolly17' I also have a 17' Tollycraft Sportabout. Mine has the 312 in it. It has sat for the past 20 years and I'm working this spring to get it back on the water. I've been searching for as much info on the interceptor motors as I can find and I'm having a hard time finding out whether certain parts are specific to the marine engine or if any ford 312 parts from a car/truck will work. Any knowledge you have on keeping these boats running would be very helpful if you're interested in chatting about it some time. I'm also on the Tollycraft facebook page. PM me if you see this and have some time to chat about it. Thanks!