Dart Big M Big Block Chevy Aluminum Bare Blocks

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 Show Less