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Dart Big M Aluminum Big Block

Dart Big M Aluminum Big Block

Your Price: $5,450.00
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Part Number:31264444
Dart Big M Aluminum Big Block Chevy 9.8 Deck / 4.500 Bore.
Cobra Power is an authorized Dart Dealer ***FREE SHIPPING***
Based on the Chevrolet big block V8 design, these new aluminum blocks feature extra strengthening in critical areas, increased displacement capacity, true priority main oiling and precision CNC machining. Conventional configuration that retains all production dimensions for compatibility with standard components.
  • Premium alloy: Dart aluminum blocks are cast from virgin 355-T61 aerospace alloy for superior strength and integrity.
  • Standard 9.800
  • 4.500" bore with siamesed extra thick cylinder walls to resist cracking and improve ring seal (minimum .300" thick with 4.625" bore).
  • Ductile iron sleeves with extra thick cylinder walls promote excellent ring seal.
  •  Reinforcing ribs strengthen the lifter valley bellhousing flange.
  • Scalloped outer water jacket walls improve coolant flow around the cylinder barrels to equalize temperatures.
  • 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.
  • Standard BBC cam bore, other options are also available.
  • Standard .842" BBC lifter bores.
  • With distributor provision.
  • Steel 4 bolt main caps with splayed outer bolts for extra strength. 
  • Mechanical fuel pump boss, clutch linkage mounts, and side and front motor mounts simplify installation in any chassis.
  • Dual oil pan bolt patterns fit standard and notched oil pans.
  • Weight 140lbs.
We are offering free freight on this item but only if shipped to a commercial location with a loading dock/forklift or terminal pick up.

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