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

World Engine Block, Cast Iron,9.80" Billet Splayed 4-Bolt Mains, 4.600 in. Bore, 2-Piece Rear Main Seal, For Chevrolet, 454, Each

World Engine Block, Cast Iron,9.80" Billet Splayed 4-Bolt Mains, 4.600 in. Bore, 2-Piece Rear Main Seal, For Chevrolet, 454, Each

$4,207.31

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

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

$4,216.56

View
World Engine Bare Block, Cast Iron, Merlin IV BB Chev Iron Block - 9.850" Deck, 4.595" Bore, Nodular Caps, Std. Cam, Std. Lifters

World Engine Bare Block, Cast Iron, Merlin IV BB Chev Iron Block - 9.850" Deck, 4.595" Bore, Nodular Caps, Std. Cam, Std. Lifters

$6,165.63

View
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

View
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 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

View