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Product Summary

3.750" Bore Size, 350 mains Main Journal Style, No

  • The Dart Little M is designed from the ground up as a true racing engine block which can be used with standard off the shelf small block components
  • The Little M is cast from premium high strength Iron and beefed up in all the critical areas
  • A competition oiling system ensures adequate lubrication to the main bearings at high RPM
  • Front and rear external oil feed, crossover and restrictor provision simplify plumbing with external pumps
  • Siamese cylinder bores with extra thick walls resist cracking and improve ring seal for more power (minimum .275” thick with 4.185” bore)

Key Specs

MFG. Part #31151411
BrandDart

Need To Know

Truck Ship

Truck shipments must be pre-paid with a credit card, certified check or money order

Quick and Easy Returns

Return Policy

Details

The Dart Little M is designed from the ground up as a true racing engine block which can be used with standard off the shelf small block components.

The Little M is cast from premium high strength Iron and beefed up in all the critical areas. A competition oiling system ensures adequate lubrication to the main bearings at high RPM. Front and rear external oil feed, crossover and restrictor provision simplify plumbing with external pumps.

FEATURES:

  • Uses standard small block parts, including cam, timing chain, oil pump, oil pan, oil filter, motor mounts, mechanical fuel pump, and clutch linkage.
  • Priority main oiling system feeds main bearings first.
  • Siamese cylinder bores with extra thick walls resist cracking and improve ring seal for more power (minimum .275” thick with 4.185” bore).
  • Open lifter valley improves oil return to pan.
  • Enlarged lifter bosses accommodate offset and oversize lifters.
  • Blind head bolt holes don’t go through to water jacket.
  • Billet steel 4-bolt main bearing caps on all 5 mains.
  • Front & rear external oil feed, crossover and restrictor provision to simplify use of external oil pumps.
  • Parts kit included

Charts

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Specifications

KEY SPECS
MFG. Part #31151411
BrandDart
GENERAL
Bore Size3.750"
Main Journal Style350 mains
Deck Height9.025"
Rear Main Seal Style2-piece
Material TypeCast Iron
Cylinder WallSiamese
Sold in QuantityEach
Freeze Plugs IncludedNo
Cam Bearings IncludedNo
Weight208 lbs.
Finished Cylinder BoresNo
Main Bearings IncludedNo
Main Bolt Style4-Bolt
Main Cap Fasteners IncludedYes
Main Cap MaterialDuctile Iron
Main Caps IncludedYes