• Siamesed cylinders: Standard 4.000” or 4.125” cylinders can be safely bored to 4.185” diameter, extra thick walls 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. Sportsman blocks use 4-bolt centers and 2-bolt end caps.
• Upgraded oiling system has been completely redesigned with a low restriction priority main oiling system.
• 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 to prevent leaks and produce more accurate torque readings. Extra thick decks prevent head gasket leaks.
• Standard camshaft and camshaft drive can be used. Lifter valley of the Sportsman block has bosses for production hydraulic roller lifters.
• Parts kit sold separately (PN 32000003).