DART Big M Mark IV Big Block Chevy Bare Iron Block

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DART Big M Mark IV Big Block Chevy Bare Iron Block

$2,383.97

DART Big M Mark IV Big Block Chevy Bare Iron Block

Engineered for applications where water between the bores is a requirement. Siamese bore versions are also available for larger bore applications.  MRK IV blocks use the 2-piece rear seal design.  These blocks are based on Dart’s Big M design, and include features like priority main oiling and 4-bolt main caps.

• Standard 9.800” and tall 10.200” deck heights available.

• Standard 4.250”, 4.310”, 4.500” and 4.600”.

• Uses +.300” tall Gen VI style lifters. Modification for Gen IV style available.

• 4-bolt main bearing caps in Ductile Iron have splayed outer bolts for extra strength.

• Lifter valley bosses for OE style roller lifters and retainer.

• Mechanical fuel pump boss, clutch linkage mounts, and side and front motor mounts simplify installation in any chassis.

 

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Description

DART Big M Mark IV Big Block Chevy Bare Iron Block

Engineered for applications where water between the bores is a requirement. Siamese bore versions are also available for larger bore applications.  MRK IV blocks use the 2-piece rear seal design.  These blocks are based on Dart’s Big M design, and include features like priority main oiling and 4-bolt main caps.

• Standard 9.800” and tall 10.200” deck heights available.

• Standard 4.250”, 4.310”, 4.500” and 4.600”.

• Uses +.300” tall Gen VI style lifters. Modification for Gen IV style available.

• 4-bolt main bearing caps in Ductile Iron have splayed outer bolts for extra strength.

• Lifter valley bosses for OE style roller lifters and retainer.

• Mechanical fuel pump boss, clutch linkage mounts, and side and front motor mounts simplify installation in any chassis.

TECH SHEET:

Deck Height ………………………………………… 9.800″ & 10.200″
Bore ………………………………………… 4.250″ or 4.310″ unfinished
Main Bearing Size ………………………………………… Standard BBC
Main Caps ………………………………………… All 4 bolt – Steel or Ductile Iron
Weight ………………………………………… 4.250″ bore = 295lb / 4.350″ = 280lb
Largest Recommended Bore ……………………………. 4.350″
Camshaft Bearing Diameter ……………………………. Standard BBC
Camshaft Position ……………………………. Standard BBC
Cylinder Wall Thickness, min. ……………………………. .270″ @ 4.350″ bore
Deck Thickness, min ……………………………. Adequate for all applications

Additional information

Choose Block Options

9.800 4.310 2-Piece, 10.200 4.310 2-Piece, 9.800 4.250 2-Piece, 10.200 4.250 2-Piece

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