Dart 31223654 Big Block Chevy, Big M2 Sportsman, Cast Iron, 10.2 Deck in., 4.6 in. Bore, Each

$3,999.99
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SKU:
DAT31223654
MPN:
31223654
Condition:
New
Weight:
250.00 LBS
Shipping:
Calculated at Checkout

Applies To Continental U.S. orders only

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New and improved through a state-of-the-art foundry and new tooling, the "Big M2" is engineered to be the most durable and easiest to build big block Chevy currently offered. Cast from high-strength iron, block may be used with standard off the shelf components, and features a competition oiling system, extra-thick cylinder walls and decks, and choice of ductile iron or billet steel main caps. Choose from standard (9.800") or tall deck (10.200") versions in 4.250", 4.500", or 4.600" bore sizes


Features
  • Standard 9.800”, 10.200” and 10.400″ deck heights
  • Standard 4.250”, 4.500”, 4.560”, or 4.600” bore sizes
  • Siamesed extra thick cylinder walls to resist cracking and improve ring seal
  • Minimum .300” thick with 4.625” bore
  • Available in .400” raised cam
  • Uses +.300” tall GEN VI style lifters.
  • 4-bolt main bearing caps in steel or ductile iron
  • Splayed Mains outer bolts for extra strength
  • Lifter valley head stud bosses help prevent blown head gaskets
  • Easy to install AN fitting oil gallery plugs
  • Engine Block Material:
    Cast iron
    Engine Block Style:
    Aftermarket/OEM tall deck
    Deck Height:
    10.200 in.
    Cylinder Bore Diameter:
    4.600 in.
    Maximum Bore Diameter:
    4.625 in.
    Cylinder Bore as Shipped:
    4.590 in.
    Finished Cylinder Bores:
    No
    Maximum Stroke:
    4.750 in.
    Main Caps Included:
    Yes
    Main Cap Material:
    Ductile iron
    Main Bolt Style:
    4-bolt
    Main Journal Type:
    454 mains
    Rear Main Seal Style:
    2-piece
    Main Cap Fasteners Included:
    Yes
    Main Bearings Included:
    No
    Engine Block Weight (lbs.):
    280 lbs.
    Raised Cam Location:
    No
    Cam Bearings Included:
    No
    Freeze Plugs Included:
    No
    Finish:
    Natural
    Quantity:
    Sold individually.
    Notes:
    Block bores are .10 undersized to allow for piston set up.
    Make:
    Chevrolet
    Engine Family:
    Chevy big block Mark IV