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Dart Big M Iron Big Block Chevy Sportsman 9.8" Deck, 4.56" Bore PN 31223544

Part Number 31223354
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Dart Big M Iron Big Block Chevy Sportsman 9.8" Deck, 4.56" Bore PN 31223544
Dart Big M Iron Big Block Chevy Sportsman 9.8' Deck, 4.56' Bore PN 31223544
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$2,443.00
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Description
Dart Big M Iron Big Block Chevy Sportsman 9.8" Deck, 4.56" Bore PN 31223544

** IN STOCK NOW **

PLEASE CALL CHRISTINA TO PURCHASE AND FOR SHIPPING QUOTE  (305) 893-5018


Dart engineered the Big M to be the strongest, most reliable, and easiest to build big block on the market.

With deck height of 9.800 and bore size 4.560, the Big M gives you the versatility to build a wide variety of engine combinations.

 The Sportsman block is fitted with Ductile Iron 4-bolt main caps.

FEATURES
Deck Height: 9.800 
Bore Size:  4.560 with siamese extra thick cylinder walls to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore).
Uses +.300 tall lifters.
Mains: 4 Bolt ductile caps have splayed outer bolts for extra strength.
True priority main oil system lubricates the main bearings before the lifters. Our stepped main oil gallery (9/16 to 1/2 to 7/16) increases the flow of oil to the crank at high RPM, and our front oil crossover eliminates internal oil leaks around the distributor shaft.
Lifter valley head stud bosses prevent blown head gaskets.
Dual oil pan bolt patterns fit standard and notched oil pans.

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