Dart's iron blocks for Fords are designed to work with stock components, but are much more than a stock replacement. Designed from the ground up for hard core racing, all the weaknesses of the factory castings have been addressed. Dart blocks are cast from premium highstrength iron with extra-thick cylinder walls and decks. The main webs are beefed up and fitted with steel 4-bolt main caps.

Every Dart block is individually qualified prior to machining to ensure maximum thickness where you need it most, every time. Dart blocks are fully CNC machined and virtually ready to assemble with offthe-shelf components.

• Siamesed cylinders: Standard 4.00” or 4.125” cylinders can be safely bored to 4.185” diameter, Extra-thick walls prevent cracking and produce excellent ring seal
• Four deck heights: 8.200” (302), 8.700” (stroker 302), 9.200” (351C) and 9.500” (351W) allow increased displacements up to 468ci.
• Steel four-bolt main bearing caps are standard. Three center caps have splayed outer bolts for maximum strength; rear cap uses standard one-piece seal. Sportsman blocks use 4-bolt centers and 2-bolt end caps
• Two main bearing diameters: 302 (2.249”) or 351C (2.749”) allow choice of small or large journal crankshaft
• Upgraded oiling system has a complete stock-type system plus a low-restriction priority main oiling system with front and rear external oil pump feeds
• Scalloped water jackets increase coolant flow around cylinder barrels to prevent detonation, extend engine life and produce consistent cylinder temperatures
• Stock components make Dart blocks a direct replacement for most production small-blocks.
  Provisions for stock motor mounts, accessory drives, smog pumps, starter brackets, oil pans and pumps
• Reinforced head bolt bosses are blind tapped to prevent leaks and produce accurate torque readings. Extra-thick decks prevent head gasket leaks
• Standard camshaft and camshaft drive can be used. Lifter valley of sportsman block has bosses for production hydraulic roller lifters

Comp blocks have billet steel 4-bolt main caps, all 5. Includes coated cam bearings, freeze plugs and dowels. Machined with front and rear external oil feed, crossover and restrictor provision.