All blocks and heads 100% resurfaced to OEM Specification, cylinders are bored and honed to exacting specifications to ensure proper ring sealing and long life. All new freeze plugs, cam bearings, rod and main bearings, pistons, rings, seals, gaskets, timing gears and chain or belt when applicable. Hde engines feature all new valve train, including hardened valve seats, intake and exhaust valves, rocker arms and pivots, new camshaft, brass freeze plugs, no weld repair on blocks and heads, hypereutectic coated pistons, 1st repair size machining.