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June Sale: $3,036.67
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Part number: 31122221
Product Details
Dart 31122221 Short Blocks
Products specifications
Cam Bearings Included Yes
Cyl Bore 4.125in
Cylinder Bore as Shipped 4.125 in.
Deck 9.325in
Deck Height (in) 9.325 in.
Engine Block Material Cast iron
Engine Block Style Aftermarket
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 400 mains
Maximum Cylinder Bore Diameter 4.185 in.
Notes Block has no provision for spin on oil filter.
Quantity Sold individually.
Raised Cam Location Yes
Rear Main Seal Style 2-piece
Tool Stroker Combinations
Iron Eagle Chevy Small Block
400 Mains

Dart Iron Eagle Sportsman blocks for small block Ford engines are powerful, competition blocks that offer racers the features they need while remaining affordable.

Features:

  • Siamesed cylinders: Standard 4.000 or 4.125 cylinders can be safely bored to 4.165 diameter. Ductile iron sleeves and extra thick walls prevent cracking and produce excellent ring seal.
  • Multiple deck heights allow for increased displacements of up to 468 cubic inches.
  • Scalloped outer water jacket walls improve coolant flow around the cylinder barrels to prevent detonation, extend engine life and produce consistent cylinder temperatures.
  • Ductile iron front and rear 2 bolt main caps with 4 bolt interior main caps. Rear cap uses standard one piece seal.
  • Two main bearing diameters 302 (2.249) or 351C (2.749) allow choice of small or large journal camshaft.
  • Stock components make Dart blocks a direct replacement for most production small blocks. Provisions for stock motor mounts, accessory drives, smog pumps, starter brackets, oil pans and pumps.
  • Upgraded oiling system has a complete stock type system plus a low restriction priority main oiling system with front and rear external oil pump feeds.
  • Dual crossovers allow oil flow to be metered with restrictors for roller lifter cams and/or rocker roller arms to reduce oil flow and windage.
  • Reinforced head bolt bosses are blind tapped to prevent leaks and produce accurate torque readings. Extra thick decks prevent head gasket leaks.
  • Standard camshaft and camshaft drive can be used. Lifter valley has bosses for production hydraulic roller lifters.
Reviews
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L
Not only was our item cheaper, it arrived quickly. Will def. purchase from Autoplicity again! Thanks!
J
Great price for the item.  Both internet and phone conversations were quick and knowledgeable.
P
Pretty good pricing on parts.
R
very smooth
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