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Technical Articles for Part Number DRT-31264354
Dart Big M Big Block Chevy Aluminum Bare Blocks 31264354
Part Number: DRT-31264354
Dart Big M Big Block Chevy Aluminum Bare Blocks
Engine Bare Blocks, Dart Big M Series, Aluminum, 10.20 in. Tall Deck, 4.250 in. Bore. 4-Bolt Mains, 2 Piece Rear Main Seal, Chevy, Big Block, Each
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Estimated Ship Date: Feb 16, 2027 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
31264354
Part Type:
Product Line:
Summit Racing Part Number:
DRT-31264354
UPC:
807051017151
Main Journal Type:
Chevy 454
Engine Block Material:
Aluminum
Engine Block Style:
Aftermarket
Engine Block Deck Height:
Tall deck
Deck Height (in.):
10.200 in.
Cylinder Bore as Shipped:
4.240 in.
Cylinder Bore Diameter:
4.250 in.
Maximum Bore Diameter (in.):
4.625
Camshaft Location:
Standard
Engine Block Weight (lbs.):
168 lbs.
Main Bolt Style:
4-bolt
Main Caps Included:
Yes
Main Cap Material:
Billet 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:
No
Freeze Plugs Included:
Yes
Remanufactured:
No
Quantity:
Sold individually.
Dart Big M Big Block Chevy Aluminum Bare Blocks
Dart aluminum big block V8s deliver big power in a lightweight package. And, based on the Chevrolet big block V8 design, Dart's Big M Big Block Chevy aluminum bare blocks are the strongest, most durable and easiest to build aluminum blocks available--making them a top choice for serious competition!
Dart Big M Big Block Chevy Aluminum Bare Block features:
*Cast from virgin 355-T61 aerospace alloy for superior strength and integrity
* Standard 9.800 in. and tall 10.200 in. deck heights available (for stroker engines)
* Standard 4.250 in., 4.500 in. or 4.600 in. bore sizes
* Ductile iron sleeves with extra thick cylinder walls promote excellent ring seal
* Reinforcing ribs strengthen lifter valley bellhousing flange
* Inboard valley head stud bosses improve gasket sealing
* Priority main oiling system delivers oil directly to the crankshaft bearings to enhance reliability at high engine speeds
* Steel 4-bolt main caps with splayed outer bolts for extra strength (ductile iron or aluminum caps are also available)
* Dual oil pan bolt patterns fit standard and notched oil pans
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Some parts are not legal for use in California or other states with similar laws / regulations
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