{"product_id":"dart-da31263654-big-m-chev-bb-chev-comp-iron-block","title":"DART DA31263654 Big M Chev BB Chev Comp Iron Block","description":"\u003cp\u003eDart engineered the Big M block to be the strongest, most reliable and easiest to build big block on the market. With multiple deck heights and bore sizes up to 4.600\", the Big M Sportsman block gives you the versatility to build a wide variety of engine combinations. A true priority main oiling system oils the main bearings before the lifters for extra reliability.\u003c\/p\u003e  \u003cp\u003e\u003cb\u003eFeatures: \u003c\/b\u003e\u003c\/p\u003e  \u003cul\u003e  \u003cli\u003eStandard 9.800\" and tall 10.200\" deck heights available for stroker engines.\u003c\/li\u003e  \u003cli\u003eStandard 4.250\" , 4.500\" or 4.600\" bore sizes with siamesed extra thick cylinder walls to resist cracking and improve ring seal (minimum .300\" thick with 4.625\" bore).\u003c\/li\u003e  \u003cli\u003eUses +.300\" tall Gen VI style lifters. Modification for Gen IV style available.\u003c\/li\u003e  \u003cli\u003eScalloped outer water jacket walls improve coolant flow around the cylinder barrels to equalize temperatures.\u003c\/li\u003e  \u003cli\u003e4 bolt billet steel main caps have splayed outer bolts for extra strength.\u003c\/li\u003e  \u003cli\u003eCrankshaft tunnel has clearance for a 4.500\" stroke crank with steel rods without grinding.\u003c\/li\u003e  \u003cli\u003eTrue priority main oil system lubricates the main bearings before the lifters. Our stepped main oil gallery (9\/16\" to 1\/2\" to 7\/16\") increases the flow of oil to the crank at high rpm, and our front oil crossover eliminates internal oil leaks around the distributor shaft.\u003c\/li\u003e  \u003cli\u003eOil filter pad is drilled and tapped for an external oil pump.\u003c\/li\u003e  \u003cli\u003eLifter valley head stud bosses prevent blown head gaskets.\u003c\/li\u003e  \u003cli\u003eRear main cap uses standard oil pump and two piece seal - no adapter required!\u003c\/li\u003e  \u003cli\u003eMechanical fuel pump boss, clutch linkage mounts, and side and front motor mounts simplify installation in any chassis.\u003c\/li\u003e  \u003cli\u003eDual oil pan bolt patterns fit standard and notched oil pans.\u003c\/li\u003e  \u003cli\u003eCoated cam bearings, freeze plugs and dowels are included.\u003c\/li\u003e \u003c\/ul\u003e \u003cbr\u003e\u003cbr\u003e","brand":"Dart","offers":[{"title":"Default Title","offer_id":44675688530231,"sku":"DA31263654","price":7823.2,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/9364\/1015\/files\/69450.jpg?v=1780435134","url":"https:\/\/enginemaster.com.au\/products\/dart-da31263654-big-m-chev-bb-chev-comp-iron-block","provider":"Engine Master","version":"1.0","type":"link"}