DART LS Next Cast Iron Blocks

Darts LS Next Iron Blocks are designed from a clean slate approach that addresses shortcomings of the factory engines. These blocks are great for hot rodders, drag racers, circle track, off-road and hi-performance marine enthusiasts. Conventional style main caps and oil pans help address the windage and oil control issues seen in factory engines utilizing seperated crankcase bays.

Features

  • Priority Main Oiling System with Two Lifter Crossovers and Restrictor Provisions
  • Siamesed Cylinder Bores with Extra Thick Walls
  • Cylinder Barrels Extended .375" at the Bottom
  • Extra Thick Deck Ensures Reliable Head Gasket Seal
  • Blind Head Bolt Holes Available in 7/16" or 1/2"
  • Scalloped Water Jackets Increase Flow Around Cylinders for Better Cooling
  • Clearence for 4.100" Stroke with Steel Rods
  • Splayed Outer Bolts on Middle Main Bearing Caps
  • LS Style Motor Mounts
  • Provisions for OE Roller Lifters, Lifter Trays and Cam
  • Uses Stock Timing Cover and Rear Cover
  • All OE Bolt Holes for Starter, Water Pump, Etc.
  • Driver or Passenger Side Starter Mounts
TYPE: 4.125 Bore Blocks"
MATERIAL: High Nickel 220 BHN Cast Iron
DECK HEIGHT (IN.): 9.240
BORE (IN.): 4.125
MAIN BEARING SIZE: Stock
MAIN CAP MATERIAL: Steel
MAIN CAP TYPE: 4-Bolt
CAM LOCATION: Stock
LIFTER BORE DIAMETER (IN.): .842 (Stock)
FREEZE PLUGS: Press Fit
REAR SEAL: Stock
WEIGHT (LBS): 227

More From This Category

DART BIG M GEN 7 (8.1 LITER), SIAMESE BIG BLOCK For Chevrolet IRON ENGINE BLOCK, 10.236, 4.600, Standard, Ductile

DART BIG M GEN 7 (8.1 LITER), SIAMESE BIG BLOCK For Chevrolet IRON ENGINE BLOCK, 10.236, 4.600, Standard, Ductile

$3,735.36

View
World Engine Block, Cast Iron,Motown II SB Chev Iron Block - 9.025" Deck, 3.995" Bore, Std Lifters, 350 Mains, Billet Caps

World Engine Block, Cast Iron,Motown II SB Chev Iron Block - 9.025" Deck, 3.995" Bore, Std Lifters, 350 Mains, Billet Caps

$6,209.73

View
Dart Engine Block, LS NEXT Chevorlet LS Gen III Aluminum, 4.000 In. Bore, 9.240 In. Deck, Each

Dart Engine Block, LS NEXT Chevorlet LS Gen III Aluminum, 4.000 In. Bore, 9.240 In. Deck, Each

$14,206.27

View
Dart Engine Block, Race Series Chevorlet Small Aluminum, 4.180 In. Bore, 9.325 In. Deck, Each

Dart Engine Block, Race Series Chevorlet Small Aluminum, 4.180 In. Bore, 9.325 In. Deck, Each

$15,136.99

View
DART BIG M PRO IRON BIG BLOCK For Chevrolet ENGINE BLOCK, 10.000, 4.600, Raised .600, Standard, Steel

DART BIG M PRO IRON BIG BLOCK For Chevrolet ENGINE BLOCK, 10.000, 4.600, Raised .600, Standard, Steel

$5,964.42

View
World Engine Block, Cast Iron, Motown LS Iron Block - 9.240 Deck, 3.995" Bore, +.134" Raised Cam, 55mm Cam, .904" Lifters, 350 Mains, Nodular Caps

World Engine Block, Cast Iron, Motown LS Iron Block - 9.240 Deck, 3.995" Bore, +.134" Raised Cam, 55mm Cam, .904" Lifters, 350 Mains, Nodular Caps

$5,448.47

View