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10/15/2029 6:27 PM
Sale Price $2,682.20
In Stock (3)
Usually delivered within 2 days
Usually delivered within 2 days
Free Shipping
Part number: 31131211
Product Details
Dart 31131211 Short Blocks
Products specifications
Cam Bearings Included Yes
Cyl Bore 4.125in
Cylinder Bore as Shipped 4.125 in.
Deck 9.025in
Deck Height (in) 9.025 in.
Engine Block Material Cast iron
Engine Block Style Stock/OEM standard deck
Finished Cylinder Bores Yes
Freeze Plugs Included Yes
Main Bearings Included No
Main Bolt Style 4-bolt
Main Cap Fasteners Included Yes
Main Cap Material Steel billet
Main Caps Included Yes
Main Journal Type 350 mains
Maximum Cylinder Bore Diameter 4.185 in.
Quantity Sold individually.
Raised Cam Location No
Rear Main Seal Style 2-piece
Tool Stroker Combinations
Little M Small Block
350 Mains

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. You can select 4.000 or 4.125 cylinder bores, and 350 or 400 main bearings with steel 4 bolt main caps. Front and rear external oil feed, crossover and restrictor provision simplify plumbing with external pumps.

With a standard deck height, extra thick siamese cylinder walls and a competition oiling system, the Little M is the perfect starting point for a powerful and reliable engine for the street or the race track.

Features:

  • Extra thick cylinder walls resist cracking and improve ring seal for more power.
  • Scalloped outer water jacket walls improve coolant flow around the cylinder barrels to equalize temperatures.
  • Priority main oiling system directs oil to the main bearings first for more dependable lubrication.
  • Blind tapped head bolt holes prevent water leaks.
  • Extra thick decks ensure reliable head gasket seal.
  • Standard small block deck height allows use of off the shelf parts.
  • Splayed outer bolts on middle main bearing caps prevent cracks.
  • Open lifter valley improves return to oil pan.
  • Enlarged lifter bosses accommodate offset and oversize lifters.
  • 4 bolt billet steel main caps have splayed outer bolts for extra strength.
  • Front and rear external oil inlets, crossovers and restrictor provisions to simplify plumbing with external pump.
  • Block includes special coated cam bearings, freeze plugs and dowels.
Reviews
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T
This was a great seller, I chose them because they had the lowest price with incredibly low shipping for the item I purchased. It arrived on time and in great shape thanks to UPS. The product was the one that was described and it fit perfectly (exhaust). I will definitely be checking back for great deals and service. 10 out of 10!!!
M
It was one of the few places I could find online that sold the Warn gaskets I was looking for.  It was a great price, shipping costs were ok, but overall I had a good experience and I'll definitely come back.
R
Excellent transaction, ordered on Monday received my goods on Wednesday...
G
Mazda cargo mat for the CX-9  SUV came within 1 week.  Mat fits perfectly; just as described.   Autoplicity had the best price listed for this product; we are very pleased.
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