For budget or stock-style rebuilds, these Silvolite pistons are designed and manufactured to exceed OEM specs and will provide reliability and a long service life. Ford, Ford Truck, 200 CI Inline 6 Cyl, 250 CI Inline 6 Cyl Recessed Head, 3.6820 Bore, Rings 5/64, 3/16, Pin Dia .9122(1963-1983)