Dart aluminum big block V8s deliver big power in a lightweight package. And, based on the Chevrolet big block V8 design, Dart's Big M Big Block Chevy aluminum bare blocks are the strongest, most durable and easiest to build aluminum blocks available--making them a top choice for serious competition! Dart Big M Big Block Chevy Aluminum Bare Block features: *Cast from virgin 355-T61 aerospace alloy for superior strength and integrity * Standard 9.800 in. and tall 10.200 in. deck heights available (for stroker engines) * Standard 4.250 in., 4.500 in. or 4.600 in. bore sizes * Ductile iron sleeves with extra thick cylinder walls promote excellent ring seal * Reinforcing ribs strengthen lifter valley bellhousing flange * Inboard valley head stud bosses improve gasket sealing * Priority main oiling system delivers oil directly to the crankshaft bearings to enhance reliability at high engine speeds * Steel 4-bolt main caps with splayed outer bolts for extra strength (ductile iron or aluminum caps are also available) * Dual oil pan bolt patterns fit standard and notched oil pans

More From This Category

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

View
Dart Engine Block, Big M, 4-Bolt Mains, 2-Piece Rear Seal, BBC 10.600 4.500 2.125 Cam, Each

Dart Engine Block, Big M, 4-Bolt Mains, 2-Piece Rear Seal, BBC 10.600 4.500 2.125 Cam, Each

$6,536.65

View
World Engine, Bare Block, Merlin IV BB Chev Iron Block - 10.200" Deck, 4.595" Bore, Billet Caps, Std. Cam, Std. Lifters

World Engine, Bare Block, Merlin IV BB Chev Iron Block - 10.200" Deck, 4.595" Bore, Billet Caps, Std. Cam, Std. Lifters

$6,340.74

View
Dart Engine Block, Big M, 4-Bolt Mains, 2-Piece Rear Seal, BBC 8.1, 10.236Met4.250 Non-Siamesed brs, Each

Dart Engine Block, Big M, 4-Bolt Mains, 2-Piece Rear Seal, BBC 8.1, 10.236Met4.250 Non-Siamesed brs, Each

$4,093.74

View
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

View
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

View