This came from a mercury marine 4 cyl 488. its basically 1/2 ford 460. it has alum block with ford 460 head,224cu inch 190 hp. someone rebuilt it and bored out .060 the pistons are stamped on top0.060 and on the side next to connect pin H535 with a symbol like a shield with an S. I need to purchase one and one ring set??????Thanx for the help,
Mark