Skip White Performance - We have the best prices you will ever find for aluminum heads, rotating assemblies and strokers
Skip White Performance
3349 E. Stone Dr.
Kingsport, TN 37660

Mon.-Thurs. 8a-7p EST
Friday 8a-3p EST
Sat 10a-3p EST
(seasonal; call to confirm)

5 star rating
272,950+ reviews!


NEW SERIES Dart BBC Engine Block 2pc RMS 4.560 Bore STD Deck 9.8 Fully Machined



Product Information

Product TypeShipped Product
Shipping Cost $250
Number of reviews 0


You may add items into your shopping cart but in order to check out you will have to call us. Our check out feature on our website is being upgraded at this time. We can take your order over the phone and answer any technical questions you may have. We accept all major credit cards, cash, check, and money orders. Just give us a call at 423-722-5152 and we can process your order promptly. In the event you attempt to reach us outside of our operating hours, please leave us a detailed message and we will return your call at our earliest opportunity.

This block is fully machined and ready for prep work. Please read the complete ad before purchasing.


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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.

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.

Note: This block is fully machined but will still require block prep work before use. This involves dremeling, grinding specific areas and chamfering the lifter bores, and installation of cam bearings, as well as extensive cleaning. All of this can be done with hand tools but doe's require extensive knowledge of the procedure. We offer a block prep package, and this includes the special cam bearings used in Dart blocks and the installation of them.

Dart blocks and heads are 100% American made and are subject to stringent quality assurance procedures to ensure superior quality and performance.


  • 2-Piece Rear Main Seal
  • 4.560 Finished Bore Ready to use, (other bore sizes available)
  • 9.800" Deck Height, Also available in 10.200 tall deck version.
  • 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.

The Dart block is bored and decked to size with our new Centroid touch probe machine. Few machine shops have a machine of this accuracy.

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We also deck the blocks to an RA finish of approx. 15 or better. The decking procedure is also done by our Centroid CNC machine. We will deck this block to the exact specs you need.

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When we're finished decking the block, it is within approx. .001 accuracy from end to end. Many machine shops fail to catch this as the machinery they use does not allow for such accuracy.

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We then plate hone the block with our new Sunnen SV15 diamond hone machine. This is also a very advanced machine that hones the block with a finish unlike conventional machines.

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  • We are not responsible for collateral damage caused by the use of this product.



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