Dart Big M Engine Block - Bare Block - 4.600 in Bore - 9.800 Deck - 4-Bolt Main - 2-Piece Seal - Big Block Chevy 31213644 ENDURO-GMR2 8 Spoke D-Hole Lightweight

8 Spoke D-Hole Lightweight

Oil Filter Adapter

Ultra Seal' Ultra-20 material swells to a controlled thickness for a tight seal

Viscosity typical of 10W-30

491 Shaft Diameter

Dart Big M Engine Block - Bare Block - 4.600 in Bore - 9.800 Deck - 4-Bolt Main - 2-Piece Seal - Big Block Chevy 31213644 ENDURO-GMR2 8 Spoke D-Hole LightweightProduct Description: Engine Big M Bare Block 4. 600 in Bore 9. 800 Deck 4 Bolt Main 2 Piece Seal Iron Big Block Chevy Sold Individually Since 1981, Dart Machinery has become the acknowledged leader in producing race winning components. Dart Machinery aluminum and cast iron engine blocks are designed to meet the specialized needs of racers and performance enthusiasts. Dart components are developed in house, manufactured on Dartas own CNC machining