{"product_id":"atk-gm-350-crate-engine-390hp-stage-3-long-block-hp89cblk","title":"ATK GM 350 Crate Engine 390HP | Stage 3 Long Block | HP89CBLK","description":"\u003cp class=\"ds-markdown-paragraph\"\u003e \u003c\/p\u003e\u003ch1\u003e\u003cstrong\u003eATK HP89CBLK GM 350 390HP Stage 3 Crate Engine | Ultimate Product Guide\u003c\/strong\u003e\u003c\/h1\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eThe ATK HP89CBLK is a high-performance, \u003cstrong\u003e390 horsepower\u003c\/strong\u003e Stage 3 crate engine that delivers turn-key power for street rods, muscle cars, and trucks. Based on the legendary Chevrolet 350 small block platform, this engine combines a \u003cstrong\u003eremanufactured cast iron block\u003c\/strong\u003e with performance \u003cstrong\u003ealuminum cylinder heads\u003c\/strong\u003e and a \u003cstrong\u003ehydraulic roller camshaft\u003c\/strong\u003e for a potent mix of reliable street manners and aggressive power.\u003c\/p\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eThis is a \u003cstrong\u003ecomplete long block package\u003c\/strong\u003e, arriving with virtually everything needed to run: a carburetor, intake manifold, distributor, plug wires, and all front accessories. Each engine is \u003cstrong\u003ehand-assembled and balanced\u003c\/strong\u003e to ensure smooth operation and maximize the output of its 10.0:1 compression hypereutectic pistons. With \u003cstrong\u003e420 lb-ft of torque\u003c\/strong\u003e, the ATK Stage 3 350 is built to deliver thrilling performance right out of the crate.\u003c\/p\u003e \u003chr\u003e \u003ch2\u003e\u003cstrong\u003eDetailed Technical Specifications\u003c\/strong\u003e\u003c\/h2\u003e \u003cdiv class=\"markdown-table-wrapper\"\u003e \u003ctable\u003e \u003cthead\u003e \u003ctr\u003e \u003cth\u003eFeature\u003c\/th\u003e \u003cth\u003eSpecification\u003c\/th\u003e \u003c\/tr\u003e \u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eATK High Performance Engines\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eHP89CBLK\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eGM Small Block Chevy 350\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eDisplacement\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e5.7L (350 cu. in.)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eHorsepower\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e390 HP\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eTorque\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e420 lb-ft\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCompression Ratio\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e10.0:1\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eBlock Material\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eRemanufactured Cast Iron\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCylinder Heads\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eATK Performance Aluminum Heads\u003c\/strong\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eValve Size (Int\/Exh)\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e2.020″ \/ 1.600″\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCamshaft Type\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eHydraulic Roller\u003c\/strong\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCam Lift (Int\/Exh)\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e.528″ \/ .536″\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCam Duration (@.050″)\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e220° \/ 224°\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/div\u003e \u003ch3\u003e\u003cstrong\u003eWhat’s Included in the Crate:\u003c\/strong\u003e\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eComplete Long Block:\u003c\/strong\u003e Assembled short block with installed heads.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eInduction:\u003c\/strong\u003e Intake Manifold \u0026amp; \u003cstrong\u003e600+ CFM Carburetor\u003c\/strong\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eIgnition:\u003c\/strong\u003e Distributor, Spark Plug Wires, \u0026amp; Spark Plugs\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eFront Accessories:\u003c\/strong\u003e Water Pump, Harmonic Balancer, Timing Cover\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eOil System:\u003c\/strong\u003e Oil Pan, Pump, \u0026amp; Pickup Tube\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eCovers:\u003c\/strong\u003e \u003cstrong\u003eBlack Valve Covers\u003c\/strong\u003e \u0026amp; Air Cleaner Assembly\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eGaskets \u0026amp; Seals:\u003c\/strong\u003e Full gasket set installed.\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003e\u003cstrong\u003eWhat’s Not Included:\u003c\/strong\u003e\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eFlexplate\/Flywheel (Required for installation)\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eEngine Wiring Harness\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eECU (Not needed – this is a carbureted engine)\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch2\u003e\u003cstrong\u003eATK Stage 3 vs. OEM \u0026amp; Other Crate Engines: Comparison Table\u003c\/strong\u003e\u003c\/h2\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eThis table shows where this performance-oriented crate engine fits in the market.\u003c\/p\u003e \u003cdiv class=\"markdown-table-wrapper\"\u003e \u003ctable\u003e \u003cthead\u003e \u003ctr\u003e \u003cth\u003eFeature\u003c\/th\u003e \u003cth\u003eATK Stage 3 350 (HP89CBLK)\u003c\/th\u003e \u003cth\u003eOEM Replacement 350\u003c\/th\u003e \u003cth\u003eBasic Performance Crate Engine\u003c\/th\u003e \u003c\/tr\u003e \u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePower Output\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003e390 HP \/ 420 lb-ft\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e~200 HP \/ 300 lb-ft\u003c\/td\u003e \u003ctd\u003e~300-330 HP\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCylinder Heads\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003ePerformance Aluminum\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eCast Iron\u003c\/td\u003e \u003ctd\u003eCast Iron or Aluminum\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCamshaft\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eHydraulic Roller (Aggressive)\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eHydraulic Flat Tappet\u003c\/td\u003e \u003ctd\u003eMild Hydraulic\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eInduction\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eIncluded (Carb \u0026amp; Intake)\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eNot Included\u003c\/td\u003e \u003ctd\u003eOften Not Included\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eIgnition\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eIncluded (Full System)\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eNot Included\u003c\/td\u003e \u003ctd\u003eOften Not Included\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eValue Proposition\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eComplete Turn-Key Power Package\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eBasic Mechanical Replacement\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eGood Balance of Power \u0026amp; Value\u003c\/strong\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/div\u003e \u003chr\u003e \u003ch2\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h2\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eQ1: Is this engine new or remanufactured?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e This engine features a \u003cstrong\u003ehandpicked, remanufactured cast iron block\u003c\/strong\u003e. The block is sourced from original GM engines, professionally cleaned, machined, and fitted with all new performance components. This process ensures strength and reliability while offering excellent value.\u003c\/p\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eQ2: What fuel and octane does this engine require?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e With a \u003cstrong\u003e10.0:1 compression ratio\u003c\/strong\u003e, this engine is designed to run optimally on \u003cstrong\u003epremium 91-93 octane gasoline\u003c\/strong\u003e. Using lower octane fuel may cause spark knock (pinging) and require timing to be retarded, resulting in lost power and potential engine damage.\u003c\/p\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eQ3: What is the benefit of a hydraulic roller camshaft?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e A hydraulic roller cam offers several advantages over a flat tappet cam:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eMore Power:\u003c\/strong\u003e Allows for more aggressive lobe profiles.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eImproved Reliability:\u003c\/strong\u003e Eliminates the risk of wiping a flat tappet lobe.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eReduced Friction:\u003c\/strong\u003e Increases horsepower and efficiency.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eEase of Break-in:\u003c\/strong\u003e No special break-in procedure is required beyond initial cam break-in.\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eQ4: Does it come with a warranty?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e Most ATK engines come with a limited warranty (e.g., 3 years\/50,000 miles). \u003cstrong\u003eAlways confirm the specific warranty terms with the retailer or ATK directly\u003c\/strong\u003e before purchase.\u003c\/p\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eQ5: What vehicle will this engine fit?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e This GM 350 small block will fit a vast range of Chevrolet and GMC vehicles from the 1950s through the 1990s (Camaros, Chevelles, Trucks, El Caminos, etc.), as well as many other cars designed to accept a small block Chevy. \u003cstrong\u003eNote:\u003c\/strong\u003e The included rear sump oil pan may not fit Chevelles with steering behind the crossmember or some Corvettes.\u003c\/p\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eQ6: Is this engine emissions-legal?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e No. This is a \u003cstrong\u003ehigh-performance, non-emissions-legal\u003c\/strong\u003e engine. It is designed for off-road and racing use or for pre-emissions vehicles. It is not certified for use in modern vehicles where emissions testing is required.\u003c\/p\u003e \u003chr\u003e \u003ch2\u003e\u003cstrong\u003ePros and Cons\u003c\/strong\u003e\u003c\/h2\u003e \u003ch3\u003e\u003cstrong\u003ePros:\u003c\/strong\u003e\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eTurn-Key Package:\u003c\/strong\u003e Includes carb, intake, distributor, and all accessories for a much easier swap.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eStrong Power Output:\u003c\/strong\u003e 390 HP and 420 lb-ft provide serious performance for street or strip.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eModern Roller Cam Technology:\u003c\/strong\u003e Offers better performance, reliability, and easier break-in.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eAluminum Heads:\u003c\/strong\u003e Reduce weight and improve heat dissipation over cast iron.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eExcellent Value:\u003c\/strong\u003e Provides a lot of horsepower and included components for the price.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eHand-Assembled \u0026amp; Balanced:\u003c\/strong\u003e Ensures quality and smooth operation.\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003e\u003cstrong\u003eCons:\u003c\/strong\u003e\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003ePremium Fuel Required:\u003c\/strong\u003e The 10.0:1 compression ratio mandates 91+ octane fuel.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eNot Emissions Legal:\u003c\/strong\u003e For off-road or pre-emissions vehicles only.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eOil Pan Limitations:\u003c\/strong\u003e The included rear sump pan may not fit all applications, requiring an additional purchase.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eRemanufactured Block:\u003c\/strong\u003e Some builders prefer a brand new block, though remanufactured blocks are perfectly reliable.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eFlexplate\/Flywheel Not Included:\u003c\/strong\u003e You must purchase the correct one for your transmission.\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch2\u003e\u003cstrong\u003eConclusion \u0026amp; Best Applications\u003c\/strong\u003e\u003c\/h2\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eThe \u003cstrong\u003eATK HP89CBLK Stage 3 350\u003c\/strong\u003e is an outstanding value for anyone looking to add serious horsepower to their project without the hassle of piecing together components. It’s a complete, well-matched package designed for strong, reliable performance.\u003c\/p\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eYou should choose this engine if:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eYou are building a \u003cstrong\u003estreet rod, classic muscle car, or hot rod truck\u003c\/strong\u003e.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eYou want a \u003cstrong\u003ecomplete, carbureted engine package\u003c\/strong\u003e that minimizes sourcing parts.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eYour goal is a strong \u003cstrong\u003e400 horsepower\u003c\/strong\u003e for aggressive street performance.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eYou value the \u003cstrong\u003ereliability and power of a modern hydraulic roller cam\u003c\/strong\u003e.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eYour vehicle is \u003cstrong\u003eexempt from emissions testing\u003c\/strong\u003e.\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eFor a powerful, ready-to-run small block Chevy that delivers on its promises, the ATK Stage 3 crate engine is a compelling and popular choice.\u003c\/p\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eDisclaimer:\u003c\/strong\u003e This is a high-performance engine designed for off-road use. Installation should be performed by experienced mechanics. Proper break-in procedures as outlined in the manufacturer’s instructions must be followed. Always ensure the engine is compatible with your vehicle’s chassis and transmission. Fuel system, cooling system, and exhaust must be appropriately sized to handle the increased power output.\u003c\/p\u003e","brand":"TITANPARTHUB","offers":[{"title":"Default Title","offer_id":52160925630695,"sku":null,"price":3684.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/7806\/3335\/files\/c8a41fa6-28.jpg?v=1780566311","url":"https:\/\/titanparthub.com\/products\/atk-gm-350-crate-engine-390hp-stage-3-long-block-hp89cblk","provider":"TITANPARTHUB","version":"1.0","type":"link"}