J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Late Model J30 versus Early Model J30

I have the late model, 1984 #507. As I read the postings I keep wondering if there were other changes to the boat other than the cockpit & quarterberth/galley. Does anyone know of any other changes? One that I am aware of is the engine; I have a 2GM20 rated at 18HP. Thanks