{"product_id":"gm-ls3-376-crate-engine-long-block-530-hp","title":"BluePrint GM LS3-Compatible Long Block Crate Engine – 376 c.i. – 530 HP","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003e530 HP · 495 lb-ft · 376 c.i. · 91+ Octane · Dyno Tested · 30-Month\/50,000-Mile Warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBuilt for builders who want serious naturally aspirated LS performance without starting from scratch, this GM LS3 Compatible 376 Crate Engine delivers 530 horsepower and 495 lb-ft of torque in a durable long block package. Designed around a high-strength LSX-style cast iron block, this engine combines proven LS reliability with upgraded internal components capable of handling aggressive off-road, street, and racing applications.\u003c\/p\u003e\n\u003cp\u003eWhether you're completing an LS swap, building a rock crawler, Ultra4 car, prerunner, muscle car, h\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003eot rod, or custom truck, the 376 cubic inch displacement offers an excellent balance of horsepower, torque, drivability, and reliability. The hydraulic roller cam and high-flow aluminum cylinder heads provide a broad powerband while maintaining excellent street manners.\u003c\/p\u003e\n\u003cp\u003eAs a long block configuration, this engine \u003cmeta charset=\"utf-8\"\u003eis not a turnkey or base-dressed engine. It gives builders the flexibility to choose their own intake manifold, fuel injection system, ECU, wiring harness, accessories, and exhaust components. It's an excellent option for custom projects where complete control over the engine management system is desired. \u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eNeed to confirm fitment or get an exact delivered price? \u003ca href=\"tel:615-962-9135\"\u003eCall\u003c\/a\u003e\u003ca href=\"(615)%20962-9135\"\u003e \u003c\/a\u003eor \u003ca href=\"sms:615-522-7164\"\u003etext\u003c\/a\u003e our team before ordering.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGM LS Compatible 376 Long Block\u003c\/li\u003e\n\u003cli\u003eAluminum Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eHydraulic Roller Camshaft\u003c\/li\u003e\n\u003cli\u003eLS Valve Covers\u003c\/li\u003e\n\u003cli\u003eLS Swap Oil Pan\u003c\/li\u003e\n\u003cli\u003eHarmonic Balancer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Intake manifold, throttle body, injectors, fuel rails, ECU, wiring harness, flexplate\/flywheel, starter, front accessory drive, ignition coils, spark plugs, and exhaust components are \u003cstrong\u003eNOT \u003c\/strong\u003eincluded\u003c\/p\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary class=\"details__header\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e \u003cspan class=\"svg-wrapper icon-plus\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\n          \u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\n          \u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\n        \u003c\/svg\u003e \u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003ctable class=\"custom-specs-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Family\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eGM LS Compatible\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplacement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e376 Cubic Inches\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHorsepower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e530 HP\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorque\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e495 lb-ft\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompression Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e10.7:1\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlock Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHigh-Strength Cast Iron (LSX Style)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4.0662\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStroke\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3.622\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMain Caps\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e6-Bolt\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear Main Seal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOne-Piece\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOiling System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePriority Main Oiling\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCrankshaft\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eNodular Iron\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnecting Rods\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e6.125\" Forged Steel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePistons\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHypereutectic Flat Top\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBalance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eInternal\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCylinder Heads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAluminum\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e69cc\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntake Valve\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.165\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Valve\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.590\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCamshaft\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHydraulic Roller\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCam Lift\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e.612\" Intake \/ .585\" Exhaust\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCam Duration @ .050\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e225° Intake \/ 238° Exhaust\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLobe Separation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e113°\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFuel Requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e91+ Octane\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOil Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e6 Quarts\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003eFitment Notes\u003c\/strong\u003e\u003cb id=\"docs-internal-guid-0515f661-7fff-e97c-38f2-2aa866f6eb89\"\u003e\u003c\/b\u003e \u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" fill=\"none\" viewbox=\"0 0 14 14\" height=\"14\" width=\"14\"\u003e\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M2.75 7H11.25\" class=\"vertical\"\u003e\u003c\/path\u003e\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M7 2.75L7 11.25\" class=\"horizontal\"\u003e\u003c\/path\u003e\n        \u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for custom LS swap projects.\u003c\/li\u003e\n\u003cli\u003eCompatible with most GM LS engine mounts and accessory systems.\u003c\/li\u003e\n\u003cli\u003eAccepts OEM LS3 front and rear covers.\u003c\/li\u003e\n\u003cli\u003eRequires an intake manifold, throttle body, fuel system, ECU, and wiring harness.\u003c\/li\u003e\n\u003cli\u003eCompatible with many popular GM manual and automatic transmissions including TH350, TH400, 4L60E, 4L80E, Powerglide, and Magnum manual transmissions when the appropriate bellhousing and flexplate\/flywheel are used.\u003c\/li\u003e\n\u003cli\u003eCustom tuning is required.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eTech Insight\u003c\/strong\u003e \u003cspan class=\"svg-wrapper icon-plus\"\u003e \u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" fill=\"none\" viewbox=\"0 0 14 14\" height=\"14\" width=\"14\"\u003e\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M2.75 7H11.25\" class=\"vertical\"\u003e\u003c\/path\u003e\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M7 2.75L7 11.25\" class=\"horizontal\"\u003e\u003c\/path\u003e\n        \u003c\/svg\u003e \u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cp\u003eThe 376 cubic inch LS3 has become one of the most popular crate engines for off-road builders because it delivers an excellent combination of horsepower, torque, reliability, and aftermarket support. The cast iron LSX-style block offers significantly greater strength than factory aluminum blocks, making it an excellent choice for vehicles that see severe vibration, repeated shock loads, and sustained high RPM operation.\u003c\/p\u003e\n\u003cp\u003eA long block also gives builders complete flexibility when selecting an engine management system. Whether you're using a Holley Terminator X, FuelTech, Haltech, or a factory GM ECU, you can build the engine package around your specific project instead of paying for components you don't intend to use.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e \u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" fill=\"none\" viewbox=\"0 0 14 14\" height=\"14\" width=\"14\"\u003e\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M2.75 7H11.25\" class=\"vertical\"\u003e\u003c\/path\u003e\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M7 2.75L7 11.25\" class=\"horizontal\"\u003e\u003c\/path\u003e\n        \u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with a long block?\u003c\/strong\u003e \u003cbr\u003eThis engine includes the assembled engine block, rotating assembly, camshaft, timing components, cylinder heads, valve covers, oil pan, and harmonic balancer. Intake components, fuel system, ignition system, ECU, and wiring are sold separately.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between a long block and a turnkey engine? \u003cbr\u003e\u003c\/strong\u003eA long block requires the builder to supply the intake system, engine management, wiring harness, fuel system, ignition components, and accessories. A turnkey engine includes nearly everything required to run.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a good engine for an LS swap?\u003cbr\u003e\u003c\/strong\u003eYes. The 376 LS is one of the most popular engines for Jeep swaps, rock crawlers, muscle cars, classic trucks, hot rods, race cars, and custom off-road vehicles because of its power, reliability, and massive aftermarket support.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e","brand":"BluePrint Engines","offers":[{"title":"Default Title","offer_id":56768349044902,"sku":"PSLS37630CT","price":8299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/files\/PSLS37630CT-GM-LS3-Engine-376ci-1.jpg?v=1784054377","url":"https:\/\/wideopendesign.com\/products\/gm-ls3-376-crate-engine-long-block-530-hp","provider":"Wide Open Design","version":"1.0","type":"link"}