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, Big M Race Series Chevorlet Big Aluminum, 4.250 In. Bore, 9.800 In. Deck, Each

Dart Engine Block, Big M Race Series Chevorlet Big Aluminum, 4.250 In. Bore, 9.800 In. Deck, Each

$15,136.99

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

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Dart Engine Block, Big M Race Series Chevorlet Big Aluminum, 4.500 In. Bore, 10.200 In. Deck, Each

Dart Engine Block, Big M Race Series Chevorlet Big Aluminum, 4.500 In. Bore, 10.200 In. Deck, Each

$15,136.99

Dart Engine Block, Big M Race Series Chevorlet Big Aluminum, 4.600 In. Bore, 9.800 In. Deck, Each

Dart Engine Block, Big M Race Series Chevorlet Big Aluminum, 4.600 In. Bore, 9.800 In. Deck, Each

$15,136.99

Dart Engine Block, Big M Chevorlet Big Aluminum, 4.500 In. Bore, 10.200 In. Deck, Each

Dart Engine Block, Big M Chevorlet Big Aluminum, 4.500 In. Bore, 10.200 In. Deck, Each

$15,136.99