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SHP Iron Block SB Chevy
InfoVehicle Info Needed
DARTPART NUMBER: 301-31161211

SHP Iron Block SB Chevy

$2,29999
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ShippingShips on 03/18/2027
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Small Block Chevy
    SHP Iron Block
  • Small Block Chevy
  • Bore: 4.125"
  • Rear Main Seal: 2-Piece
  • 350 Main Journals

    Specifications:
    Material:     Superior iron alloy
    Bore: 4.125" (unfinished)
    Bore/Stroke: 4.165" x 3.750" (max recommended)
    Cam Bearing Bore ID: SBC 2.00"
    Cam Bearings: Specially-coated & grooved with three oil holes
    Cam Bearing OS: +.010", +.020", +.030"
    Cam Bearing Press: .002"
    Cam Journal OD: Standard SBC 1.869"
    Cam Plug: 2-7/64" shallow cup
    Cylinder Wall Thickness: .230" minimum @ 4.165" bore
    Deck Height: 9.025"
    Deck Thickness: .625" minimum
    Fuel Pump: Mechanical pump provision
    Fuel Pump Pushrod: Standard length
    Freeze Plugs: Press-in cup plugs 1-5/8"
    Lifter Bores: SBC .8430" to .8440"
    Main Bearing Size: 2.450" (350)
    Main Bearing Bore: 2.6405 to 2.6415 (350)
    Main Caps: Class 35 iron, 4 bolt, center 3
    Main Cap Register: Deep stepped register on each side (no need for dowels)
    Main Cap Press: .005"
    Main Cap Bolts: #1, #5 - 7/16" (2); #2, #3, #4 - 7/16" 3/8" splayed (2)
    Oil System: Wet sump, main priority oiling (can use dry sump)
    Oil Pump Shaft: 350 main = stock shaft (.481" OD)
    Oil Filter: Standard SBC filter (uses 2-bolt filter adapter)
    Oil Pan: Standard SBC oil pan
    Rear Main Seal: 350 main, standard seal, 2-piece
    Serial Number: On main caps and left front
    Starter: Standard SBC
    Stud Hole/Head: Blind holes
    Timing Chain/Gears: Standard SBC components
    Timing Cover: Can use stock stamped steel or plastic
    Torque: 65 ft/lbs (7/16" bolts), 35 ft/lbs (3/8" bolts)
    Weight: 175 lbs

    Note:The lifter bosses in SHP blocks are .220" taller than the bosses in early-style blocks that were not designed for hydraulic roller lifters. If you are installing aftermarket lifters with link bars in an SHP block, the lifters must be designed for use in 1987-up or Bow Tie blocks.

    Due to the additional length of these aftermarket tie-bar lifters, they must be installed in the block before the cylinder heads are installed.

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

Why waste time sourcing, cleaning, machining, and prepping an old core in hopes it will be usable when you could get a new, quality block without the expense of a full-race unit? Dart "SHP" Special High Performance Blocks enable you to affordably build a powerful, durable engine. Designed for high-performance and heavy-duty applications producing up to 600 horsepower, the SHP Block is an ideal starting point for hot rodders, drag racers, Circle Track competitors, off-roaders, and marine enthusiasts. .

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One of the great provisions of the Dart SHP block is its ability to use OE hydraulic roller lifters. There are mounting bosses in the valley for a factory stamped steel spider, and the lifter bores are machined flat on top to accommodate the "dog bone" alignment bars used on OE hydraulic roller lifters. This allows an engine builder to take advantage of the fast acceleration and low maintenance of a hydraulic roller cam profile while using inexpensive stock-type lifters.

Features

  • Designed for compatibility with stock components
  • Virtually ready to assemble right out of the box after a final cylinder hone
  • Precision machined from high-nickel cast iron
  • Decks even and parallel within .002"
  • Siamese bores 4.000" OR 4.125" (unfinished)
  • Cylinder walls .230" minimum at 4.165"
  • Priority main oiling system (oil is directed to main bearings first, then to cam bearings)
  • Splayed 4-bolt center three main caps
  • Blind head bolt holes
  • OE bolt holes for starter, clutch ball, etc.
  • Uses stock timing cover
  • Provisions for stock roller lifters and cams

    Tech Tip: Oiling System

    Tech Tip: Roller Lifters

Part TypeEngine Block
Product LineDart Special High Performance Engine Blocks
BrandDART
Package Height14.0
Package Width19.0
Package Length23.0
Weight191.0 PG
Part CategoryPerformance Parts
Main Journal Type350 mains
Engine Block StyleAftermarket
Engine Block MaterialCast iron
Cylinder Bore As Shipped4.115 in (104.521 mm)
Engine Block Weight (Lbs.)175
QuantitySold individually
Raised Cam LocationNo
Freeze Plugs IncludedNo
Main Bolt Style4-bolt
Deck Height9.025 in (229.235 mm)
Main Bearings IncludedNo
Main Cap MaterialDuctile iron
Rear Main Seal Style2-piece
Main Caps IncludedYes
Finished Cylinder BoresNo
Cylinder Bore Diameter4.125 in (104.775 mm)
Cam Bearings IncludedNo
Part FitmentSemi Universal
Main Cap Fasteners IncludedYes
Vendor Part Number31161211
Package Qty1
Package TypeEA
Please click here to download the instructions PDF file
Some parts are not legal for use in California or other states with similar laws / regulations
p65 warning