phone: 316 775 7771

Dart Big M BBC Cast Iron Bare Blocks #31213654 (IN STOCK)

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The Dart Big M big block Chevy cast iron bare blocks no-compromise design solves the problems that have plagued big blocks for the years. The Dart Big M features extra-thick cylinder walls, and are available with a choice of different deck heights and cylinder bores, so there's sure to be a Big M block for you to build a better big block to suit your needs.



Part Type: Engines, Bare Blocks

Product Line: Dart Big M Big Block Chevy Cast Iron Bare Blocks

Main Journal Type: OEM

Engine Block Style: Aftermarket/OEM tall deck

Deck Height (in): 10.200 in.

Cylinder Bore as Shipped: 4.590 in.

Cylinder Bore Diameter: 4.600 in.

Engine Block Material: Cast iron

Engine Block Weight (lbs): 250 lbs.

Main Bolt Style: 4-bolt

Main Caps Included: Yes

Main Cap Material: Steel

Main Cap Fasteners Included: Yes

Main Bearings Included: No

Rear Main Seal Style: 2-piece

Finished Cylinder Bores: No

Raised Cam Location: No

Cam Bearings Included: Yes

Freeze Plugs Included: Yes

Quantity: Sold individually.

Notes: Block bores are .10 undersized to allow for piston set up.

Call 316-775-7771 to purchase.


WARNING: This product contains a chemical known to the State of California to cause cancer and reproductive harm. See for details.