During that year Indmar engines were the flavor of choice, sometimes it was PCM, (both had distributors in Fl.) Ford being the "Std." engine & the Chevy an optional up-charge. (back then Ford was trying to control the marine engine market, they later gave up & quit selling to marinizers altogether) The HP Chevy was marinized by another vendor usually Hardin, and the cost covered added shipping cost, Alum. exh. Alum intake, 4 bolt mains, chrome valve covers, and was painted black, had a crank driven water pump. This motor was rated at 290 HP vs 260 HP for the std. Chevy.