Dart is committed to producing the best engine components available, including the Dart Big M Mark IV big block Chevy full water cast iron bare blocks--engineered for applications where water between the bores is a requirement. Siamese bore versions are also available for larger bore applications.

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DART Engine Block, Cast Iron, 4-Bolt Mains, 4.250 in. Diameter Bore, 2-Piece Rear Main Seal, For Chevrolet, Big Block, Each

DART Engine Block, Cast Iron, 4-Bolt Mains, 4.250 in. Diameter Bore, 2-Piece Rear Main Seal, For Chevrolet, Big Block, Each

$4,205.15

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Dart Engine Block, Big M, 4-Bolt Mains, 2-Piece Rear Seal, BBC 9.800 4.500 2.125 Cam, Each

Dart Engine Block, Big M, 4-Bolt Mains, 2-Piece Rear Seal, BBC 9.800 4.500 2.125 Cam, Each

$6,536.65

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World ENGINE BLOCK Merlin III BB For Chevrolet, 9.800' x 4.245', standard cam, nodular iron splayed main caps

World ENGINE BLOCK Merlin III BB For Chevrolet, 9.800' x 4.245', standard cam, nodular iron splayed main caps

$3,978.32

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DART Engine Block, Cast Iron, 4-Bolt Mains, 4.550 in. Diameter Bore, 2-Piece Rear Main Seal, For Chevrolet, Big Block, Each

DART Engine Block, Cast Iron, 4-Bolt Mains, 4.550 in. Diameter Bore, 2-Piece Rear Main Seal, For Chevrolet, Big Block, Each

$4,341.67

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World Engine Bare Block, Cast Iron, Merlin IV BB Chev Iron Block - 9.800" Deck, 4.595" Bore, Nodular Caps, Std. Cam, Std. Lifters

World Engine Bare Block, Cast Iron, Merlin IV BB Chev Iron Block - 9.800" Deck, 4.595" Bore, Nodular Caps, Std. Cam, Std. Lifters

$6,165.63

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Dart Engine Block, Big M, 4-Bolt Mains, 2-Piece Rear Seal, BBC 10.2, Standard, 4.310water bn br GenV, Each

Dart Engine Block, Big M, 4-Bolt Mains, 2-Piece Rear Seal, BBC 10.2, Standard, 4.310water bn br GenV, Each

$4,216.56

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