Description

Dart Machinery has completely redesigned the Big M series Block. They have incorporated numerous improvements and new features to virtually every area of the block.
The actual bore size on this block is approx. 4.590 for use in engine builds requiring a 4.600 or larger bore size. See our other listings for other bore sizes and we also offer the standard deck version of this for 572 engine builds.
We now use the New Generation Dart blocks in all of our bbc engine builds. The New Generation Dart block is light years ahead in overall construction as compared to any of the other blocks on the market. Dimensional specs are spot on, and this has been an issue with other blocks we have used in the past. Many of the top engine builders, ourselves included, have found the new Dart block to be superior to the earlier generation Big M series Dart block in many ways.
Dart blocks and heads are 100% American made and are subject to stringent quality assurance procedures to ensure superior quality and performance.
Features:
- 2-Piece Rear Main Seal. Tall deck 10.200
- 4.600 Comes to you at approx. 4.590 (other bore sizes available)
- 10.200″ Deck Height, Also available in 9.8 std deck version for 572 builds.
- Standard BBC Camshaft Bearing Journal
- Standard BBC Lifter Bore
- Ductile Iron Main Caps
- High Density 220 BHN Iron Construction
- Priority Main Oiling
- Bores up to 4.625″ max
- Accepts +.300″ Tall Aftermarket Lifters
- Clearance for 4.375″ Stroke – 9.800″ Deck
- Splayed 4-Bolt Main Caps with Dowels & Stepped Register.
- Accepts Standard Big Block Chevy Components
- OE-style Fuel Pump & Starter Mounts
- Approximately 270 lbs
- Rated to 1000+ Horsepower
- Made In USA
Warranty: Dart Machinery warrants its products to be free from defects in materials and workmanship. No other warranties apply.
Additional information
Brand | DART |
---|---|
Manufacturer Warranty | Unspecified Length |
Manufacturer Part Number | 31223654 |
Material | Cast Iron |
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