Race Series Ford 351 Windsor Aluminum Block – 4.125 in. Bore, 9.200 in. Deck

With pressed-in dry sleeves, upgraded oiling and steel 4-bolt main caps, Dart’s Aluminum blocks have the features that Ford racers need to build powerful and reliable engines.
Premium alloy: Dart Aluminum blocks are cast from RMR cast Aluminum alloy for superior strength and integrity; Extended cylinder barreLS2 for improved piston support; Four deck heights: 8.200” (302), 8.700” (stroker 302), 9.200” (351C) and 9.500” (351W) allow displacements up to 450 cubic inches; Siamesed cylinders: Standard 4.000” or 4.125” cylinders can be safely bored to 4.165” diameter. Ductile Iron sleeves and extra thick walLS2 prevent cracking and produce excellent ring seal; Steel 4-bolt main bearing caps are standard. Three center caps have splayed outer bolts for maximum strength; rear cap uses standard one piece seal; Upgraded oiling system has been completely redesigned with a low restriction priority main oiling system with rear external oil pump feed; Dual crossovers allow oil flow to be metered with restrictors for roller lifter cams and/or roller rocker arms to reduce oil flow and windage; Reinforced head bolt bosses are blind tapped to prevent leaks and produce accurate torque readings. Extra thick decks prevent head gasket leaks; Parts kit included (PN 32000004)