Dart Big M Mark IV Big Block Chevy Full Water Cast Iron Bare Blocks 31213655

Name: Dart Big M Mark IV Big Block Chevy Full Water Cast Iron Bare Blocks
Brand: Dart
SKU: DRT-31213655
Price: 4334.99 USD
Availability: OutOfStock
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Part Number: DRT-31213655

$4,334.99

Dart Big M Mark IV Big Block Chevy Full Water Cast Iron Bare Blocks

Engine Block, Cast Iron, 4-Bolt Mains, 4.600 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Big Block, Each
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Dart Big M Mark IV Big Block Chevy Full Water Cast Iron Bare Blocks 31213655

DRT-31213655

Not Yet Reviewed

Part Number: DRT-31213655

Estimated Ship Date: Feb 22, 2027

$4,334.99

Overview

Applications

Q&A

Instructions & Calculators

Estimated Ship Date: Feb 22, 2027 Would you rather pick it up?

Overview

Brand:

Dart

Manufacturer's Part Number:

31213655

Part Type:

Engines, Bare Blocks

Product Line:

Dart Big M Mark IV Big Block Chevy Full Water Cast Iron Bare Blocks

Summit Racing Part Number:

DRT-31213655

UPC:

807051046397

Main Journal Type:

Chevy 454

Engine Block Material:

Cast iron

Engine Block Style:

Aftermarket

Engine Block Deck Height:

Tall deck

Deck Height (in.):

10.200 in.

Cylinder Bore as Shipped:

4.590 in.

Cylinder Bore Diameter:

4.600 in.

Maximum Bore Diameter (in.):

4.600

Camshaft Location:

Standard

Engine Block Weight (lbs.):

280 lbs.

Main Bolt Style:

4-bolt

Main Caps Included:

Yes

Main Cap Material:

Billet steel

Main Cap Fasteners Included:

Yes

Main Bearings Included:

Rear Main Seal Style:

2-piece

Finished Cylinder Bores:

Raised Cam Location:

Yes

Cam Bearings Included:

Freeze Plugs Included:

Yes

Remanufactured:

Quantity:

Sold individually.

Dart Big M Mark IV Big Block Chevy Full Water Cast Iron Bare Blocks

Dart is committed to producing the best engine components available, including the Dart Big M Mark IV big block Chevy full water cast iron bare blocks--engineered for applications where water between the bores is a requirement. Siamese bore versions are also available for larger bore applications.

Features of the Dart Big M Mark IV big blocks include:

* Standard 9.800 in. and tall 10.200 in. deck heights available
* Standard 4.250 in. or 4.600 in. bore sizes
* MRK IV blocks use the 2-piece rear seal design, while Gen V and Gen VI blocks use a 1-piece seal and a different timing cover pattern
* 4-bolt main bearing caps in ductile iron have splayed outer bolts for extra strength
* True priority main oiling (lubricates the main bearings before the lifters)
* Mechanical fuel pump boss, clutch linkage mounts, and side and front motor mounts simplify installation in chassis
* Lifter valley bosses for OE style roller lifters and retainer; (Non-Siamese blocks only)