{"product_id":"dart-da31213344-chev-big-block-big-m-iron-engine-block-4-250-in-bore","title":"DART DA31213344 Chev Big Block Big M Iron Engine Block 4.250 In. Bore","description":"\u003cp\u003eFeatures:\u003c\/p\u003e  \u003cul\u003e  \u003cli\u003eDuctile iron 4-bolt mains caps for ultimate bottom-end strength\u003c\/li\u003e  \u003cli\u003eSiamesed extra thick cylinder walls to resist cracking and improve ring seal (minimum .300 in. thick with 4.625 in. bore)\u003c\/li\u003e  \u003cli\u003eUses +.300 in. tall GM Gen VI style lifters\u003c\/li\u003e  \u003cli\u003eCrankshaft tunnel has clearance for a 4.500 in. stroke with steel rods without grinding\u003c\/li\u003e  \u003cli\u003eMain bearing caps have splayed outer bolts for extra strength\u003c\/li\u003e  \u003cli\u003eTrue priority main oil system lubricates the main bearings before the lifters\u003c\/li\u003e  \u003cli\u003eStepped main oil gallery (9\/16 in. to 1\/2 in. to 7\/16 in.) increases the flow of oil to the crankshaft at high RPM, and front oil crossover eliminates internal oil leaks around the distributor shaft\u003c\/li\u003e  \u003cli\u003eLifter valley head stud bosses prevent blown head gaskets\u003c\/li\u003e  \u003cli\u003eDual oil pan bolt patterns fit standard and notched oil pans\u003c\/li\u003e  \u003cli\u003e220 BHN cast iron block material\u003c\/li\u003e  \u003cli\u003e.842 in. lifter bores\u003c\/li\u003e  \u003cli\u003ePress-fit freeze plugs\u003c\/li\u003e  \u003cli\u003e2-Piece rear main seal\u003c\/li\u003e  \u003cli\u003eIncludes block parts kit 301-32000002 - coated cam bearings, freeze plugs and dowel pins\u003cbr\u003e   \u003c\/li\u003e \u003c\/ul\u003e  \u003cp\u003eSpecifications:\u003c\/p\u003e  \u003cul\u003e  \u003cli\u003eMaterial: Superior Iron Alloy\u003c\/li\u003e  \u003cli\u003eBore: 4.250''\u003c\/li\u003e  \u003cli\u003eBore \u0026amp; Stroke: 4.625'' x 4.750'' max recommended\u003c\/li\u003e  \u003cli\u003eCam Bearing Bore ID: 2.1195'' - 2.1205''\u003c\/li\u003e  \u003cli\u003eCam Bearings: Special coated, grooved, with 3 oil holes\u003c\/li\u003e  \u003cli\u003eCam Bearing OS: +.010'', +.020'', +.030''\u003c\/li\u003e  \u003cli\u003eCam Bearing Press: .002''\u003c\/li\u003e  \u003cli\u003eCamshaft Position: Standard\u003c\/li\u003e  \u003cli\u003eCam Drive: Standard Timing chain, gear drive or belt drive\u003c\/li\u003e  \u003cli\u003eCam Plug: Standard BBC 2-7\/32'' (2.218'' dia)\u003c\/li\u003e  \u003cli\u003eCubic Inch: 632'' max recommended\u003c\/li\u003e  \u003cli\u003eCylinder Wall Thickness: .300'' min @ 4.625'' bore\u003c\/li\u003e  \u003cli\u003eDeck Height: 9.800''\u003c\/li\u003e  \u003cli\u003eDeck Thickness: Adequate for all applications\u003c\/li\u003e  \u003cli\u003eFuel Pump: Mechanical pump provision\u003c\/li\u003e  \u003cli\u003eFuel Pump Pushrod: Standard BBC\u003c\/li\u003e  \u003cli\u003eFreeze Plugs: Press in cup plugs\u003c\/li\u003e  \u003cli\u003eHead Gasket: Fel-Pro 375-1037, 1047, or 1067\u003c\/li\u003e  \u003cli\u003eInner Head Stud: 2 slotted bosses per side\u003c\/li\u003e  \u003cli\u003eLifter Bores: BBC .8427'' - .8437''\u003c\/li\u003e  \u003cli\u003eLifter Galley: Raised .350'' for longer lifter bore\u003c\/li\u003e  \u003cli\u003eLifter Type: Roller - Gen VI (+.300'' longer), Solid - Mark IV\u003c\/li\u003e  \u003cli\u003eMain Bearing Size: Standard BBC\u003c\/li\u003e  \u003cli\u003eMain Bearing Bore: 2.937'' - 2.937''\u003c\/li\u003e  \u003cli\u003eMain Caps: 4-bolt steel billet\u003c\/li\u003e  \u003cli\u003eMain Cap Register: Deep stepped register on each side (No need for dowels)\u003c\/li\u003e  \u003cli\u003eMain Cap Press: .005''\u003c\/li\u003e  \u003cli\u003eMain Cap Bolts: All 1\/2'', #2, #3, #4 have splayed outer bolts\u003c\/li\u003e  \u003cli\u003eOil System: Wet or Dry Sump - Main Priority Oiling\u003c\/li\u003e  \u003cli\u003eOil Galley, Main: Stepped, 9\/16'' - 1\/2'' - 7\/16''\u003c\/li\u003e  \u003cli\u003eOil Galley, Filter-Main: 5\/8''\u003c\/li\u003e  \u003cli\u003eOil Filter: Stock Oil Filter Location\u003c\/li\u003e  \u003cli\u003eOil Pan: Standard pan bolt pattern, extra bolt holes provided for strokers\u003c\/li\u003e  \u003cli\u003eRear Main Seal: Standard 2-piece seal, Fel-Pro 375-2918\u003c\/li\u003e  \u003cli\u003eRear Main Thrust Width: 1.622'' - 1.624''\u003c\/li\u003e  \u003cli\u003eSerial Number: On main caps\u003c\/li\u003e  \u003cli\u003eStarter: Mounts in standard location\u003c\/li\u003e  \u003cli\u003eStud Hole, Head: Blind holes\u003c\/li\u003e  \u003cli\u003eTiming Chain\/Gears: Standard\u003c\/li\u003e  \u003cli\u003eTiming Cover: Stock Cover\u003c\/li\u003e  \u003cli\u003eTorque Specs: All 1\/2'' bolts - 105 lbs\u003c\/li\u003e  \u003cli\u003eWeight: 4.250'' bore - 260 lbs\u003c\/li\u003e \u003c\/ul\u003e \u003cbr\u003e\u003cbr\u003e\u003cul\u003e  \u003cli\u003eQuantity: Sold individually\u003c\/li\u003e  \u003cli\u003eRear Main Seal Style: 2-piece\u003c\/li\u003e  \u003cli\u003eEngine Block Material: Cast iron\u003c\/li\u003e  \u003cli\u003eMain Journal Type: OEM\u003c\/li\u003e  \u003cli\u003eCam Bearings Included: Yes\u003c\/li\u003e  \u003cli\u003eEngine Block Style: Stock\/OEM standard Deck\u003c\/li\u003e  \u003cli\u003eEngine Block Style: Stock\/OEM standard deck\u003c\/li\u003e  \u003cli\u003eFinished Cylinder Bores: No\u003c\/li\u003e  \u003cli\u003eFreeze Plugs Included: Yes\u003c\/li\u003e  \u003cli\u003eMain Bearings Included: No\u003c\/li\u003e  \u003cli\u003eMain Cap Fasteners Included: Yes\u003c\/li\u003e  \u003cli\u003eMain Cap Material: Steel\u003c\/li\u003e  \u003cli\u003eMain Caps Included: Yes\u003c\/li\u003e  \u003cli\u003eRaised Cam Location: No\u003c\/li\u003e  \u003cli\u003eMain Bolt Style: 4-bolt\u003c\/li\u003e  \u003cli\u003eEngine Block Weight (lbs.): 280\u003c\/li\u003e  \u003cli\u003eCylinder Bore as Shipped: 4.24 in (107.696 mm)\u003c\/li\u003e  \u003cli\u003eCylinder Bore Diameter: 4.25 in (107.95 mm)\u003c\/li\u003e  \u003cli\u003eDeck Height: 9.8 in (248.92 mm)\u003c\/li\u003e  \u003cli\u003eManufacturer's Part Number:: 31263344\u003c\/li\u003e \u003c\/ul\u003e","brand":"Dart","offers":[{"title":"Default Title","offer_id":44653209616695,"sku":"DA31213344","price":8780.25,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/9364\/1015\/files\/628709.jpg?v=1778859038","url":"https:\/\/enginemaster.com.au\/products\/dart-da31213344-chev-big-block-big-m-iron-engine-block-4-250-in-bore","provider":"Engine Master","version":"1.0","type":"link"}