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Big Block Chevy

DART Big Block Chevy Big M and Big M Sportsman Race Blocks

  • DART's BBC Blocks are available in 9.8 (Standard Deck) and 10.2 (Tall Deck)
  • Blocks are available in 4.250, 4.500 and 4.600 bore sizes. Limited blocks are also available with a 4.560 bore.
  • DART's new Race Series big blocks will aso be available soon. Please inquire if this is what you're looking for! Quick notes: 10.6" or 11.1" Deck heights, .600 raised cam, 4.840 or 4.900 bore spacing, roller cam bearings standard, .903 lifter bores and billet main caps. Available first quarter 2005.
  • DART offers roller cam bearings, .903 lifter bores (and other) as well as bronze lifters as special order options on their blocks. Please inquire if you're looking for a specific optioned race block.

DART Sportsman vs. DART Billet Cap Block Comparision:

Both the DART Sportsman and DART Billet Cap Blocks are made with the same castings and the same machinery. The largest difference is the price, about $300 and the cap material; Billet Steel vs. Nodular Iron (Sportsman.) DART billet cap blocks include DART coated cam bearings and freeze plugs, the DART Sportsman blocks do not include these additional parts.

They both include:

  • 4.625" bore capacity
  • DART Priority Main Oiling
  • 4 bolt main caps
  • 2 slotted bosses for inside head studs

Technical notes:

All DART blocks require final machining before assembly. The bores are .010 undersize and require a fnal hone to size, the main line and lifter bores are generally slightly tight and need a quick hone, and sizing needs to be checked on all components to insure proper clearance. There simply is no 'ideal' spec, every crankshaft and lifter manufacture has their own tolerance, the blocks are machined with this in mind. These components an clearances need to be exact to the block, not 'close enough' if you want your engine to last. All DART blocks are 2 piece rear main seals, lifter bores are raised -Roller cams require Gen VI lifters, Solid - Mark IV.

***If you don't see it please ask! We're a Full Line Stocking DART Dealer!***