{"product_id":"atk-high-performance-chevy-383-stroker-470-hp-mid-dress-long-block-crate-engines-hp101m","title":"ATK High Performance Chevy 383 Stroker 470 HP Mid-Dress Long Block Crate Engines HP101M","description":"\u003ch2\u003e\u003cstrong\u003eATK High Performance Chevy 383 Stroker Crate Engine – 470 HP | HP101M\u003c\/strong\u003e\u003c\/h2\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eUnleash raw, untamed power with the ATK HP101M—a 383 cubic inch Chevy stroker crate engine built to dominate both the street and the strip. This isn’t just an engine; it’s a statement, producing a massive 470 horsepower and 490 lb-ft of torque with a aggressive demeanor and a soundtrack to match. Designed for the enthusiast who refuses to compromise, this mid-dress long block comes loaded with premium components right out of the box, minimizing the parts you need to source and maximizing the fun.\u003c\/p\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eBuilt on a seasoned GM 4-bolt main block, this stroker combines a SCAT forged rotating assembly with proven performance parts like Dart SHP aluminum heads, a hydraulic roller cam, and a Weiand Stealth dual-plane intake. The “mid-dress” configuration is its key advantage, including critical components like an MSD HEI distributor, harmonic balancer, water pump, and valve covers, saving you significant time and money.\u003c\/p\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eBe advised: this engine is built for performance, not practicality. Its aggressive cam profile means it will not produce sufficient vacuum for power brakes and requires a high-stall torque converter (2,500 RPM+) for automatic transmissions. If your goal is a brutal, high-revving small block that makes its presence known, the ATK HP101M delivers turn-key fury.\u003c\/p\u003e \u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e \u003cdiv class=\"ds-scroll-area _1210dd7\"\u003e \u003cdiv class=\"ds-scroll-area__gutters\"\u003e \u003cdiv class=\"ds-scroll-area__horizontal-gutter\"\u003e\u003c\/div\u003e \u003cdiv class=\"ds-scroll-area__vertical-gutter\"\u003e\u003c\/div\u003e \u003c\/div\u003e \u003ctable\u003e \u003cthead\u003e \u003ctr\u003e \u003cth\u003eSpecification Category\u003c\/th\u003e \u003cth\u003eDetail\u003c\/th\u003e \u003c\/tr\u003e \u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eHP101M\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eChevrolet Small Block V8 Stroker\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eDisplacement\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e383 cu. in. \/ 6.3L\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMax Horsepower (HP)\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e470 HP @ 5,200 RPM\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMax Torque (lb-ft)\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e490 lb-ft @ 4,800 RPM\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\u003eEngine Block\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eSeasoned GM Cast Iron (4-Bolt Main)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCrankshaft\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eSCAT Nodular Iron\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eConnecting Rods\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eSCAT 4340 Forged I-Beam w\/ ARP Bolts\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePistons\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eForged\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCylinder Head Material\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eAluminum (Dart SHP, 72cc Chamber)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eValve Size\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e2.02″ Intake \/ 1.60″ Exhaust\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eValvetrain\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eBillet 1.6 Ratio Aluminum Roller Rockers\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCamshaft Type\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eHydraulic Roller\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCamshaft Specs\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e224°\/236° Duration @ .050″, .591″\/.591″ Lift, 108° LSA\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eFuel Requirement\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e91 Octane (Premium) or Higher\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eOil Recommendation\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e10W-30\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eRear Main Seal\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e1-Piece\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/div\u003e \u003ch3\u003e\u003cstrong\u003eWhat’s Included (Mid-Dress Long Block)\u003c\/strong\u003e\u003c\/h3\u003e \u003cdiv class=\"ds-scroll-area _1210dd7\"\u003e \u003cdiv class=\"ds-scroll-area__gutters\"\u003e \u003cdiv class=\"ds-scroll-area__horizontal-gutter\"\u003e\u003c\/div\u003e \u003cdiv class=\"ds-scroll-area__vertical-gutter\"\u003e\u003c\/div\u003e \u003c\/div\u003e \u003ctable\u003e \u003cthead\u003e \u003ctr\u003e \u003cth\u003eIncluded\u003c\/th\u003e \u003cth\u003eNot Included \/ Required Separately\u003c\/th\u003e \u003c\/tr\u003e \u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e✓ Fully Assembled Long Block\u003c\/td\u003e \u003ctd\u003e✗ Carburetor\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e✓ Weiand Stealth Dual-Plane Intake Manifold\u003c\/td\u003e \u003ctd\u003e✗ Spark Plugs \u0026amp; Wires\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e✓ MSD GM HEI Distributor\u003c\/td\u003e \u003ctd\u003e✗ Flexplate \/ Flywheel\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e✓ Aluminum Valve Covers\u003c\/td\u003e \u003ctd\u003e✗ Air Cleaner\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e✓ Harmonic Balancer (Internal Balance)\u003c\/td\u003e \u003ctd\u003e�\u003cem\u003eFuel Pump\u003c\/em\u003e\n\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e✓ Water Pump (Long Style)\u003c\/td\u003e \u003ctd\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e✓ Timing Cover\u003c\/td\u003e \u003ctd\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e✓ Oil Pan (5-Quart OEM Style)\u003c\/td\u003e \u003ctd\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/div\u003e \u003ch3\u003e\u003cstrong\u003eComparison Table: ATK HP101M vs. Alternatives\u003c\/strong\u003e\u003c\/h3\u003e \u003cdiv class=\"ds-scroll-area _1210dd7\"\u003e \u003cdiv class=\"ds-scroll-area__gutters\"\u003e \u003cdiv class=\"ds-scroll-area__horizontal-gutter\"\u003e \u003cdiv class=\"ds-scroll-area__horizontal-bar\"\u003e\u003c\/div\u003e \u003c\/div\u003e \u003cdiv class=\"ds-scroll-area__vertical-gutter\"\u003e\u003c\/div\u003e \u003c\/div\u003e \u003ctable\u003e \u003cthead\u003e \u003ctr\u003e \u003cth\u003eFeature\u003c\/th\u003e \u003cth\u003eATK HP101M 383 Stroker\u003c\/th\u003e \u003cth\u003eMild Street 383 Crate Engine\u003c\/th\u003e \u003cth\u003eDIY 383 Build\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\u003e470 HP \/ 490 lb-ft (Aggressive)\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e~400-430 HP \/ 450 lb-ft\u003c\/td\u003e \u003ctd\u003eUnknown (Risk of Imbalance)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCamshaft Profile\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eAggressive Hyd. Roller (108 LSA)\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eMild Hyd. Roller (112+ LSA)\u003c\/td\u003e \u003ctd\u003eVaries\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eVacuum Production\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eVery Low (Not for Power Brakes)\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eGood (Supports Power Brakes)\u003c\/td\u003e \u003ctd\u003eVaries\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eConfiguration\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eMid-Dress (Includes Intake, Dist., WP)\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eOften Long Block Only\u003c\/td\u003e \u003ctd\u003eSelf-Sourced\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eIdeal Use\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eStreet\/Strip, Race Applications, Hot Rods\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eCruising, Daily Driving, Restomods\u003c\/td\u003e \u003ctd\u003eFor Experienced Builders Only\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eValue Proposition\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eHigh Power with Key Components Included\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eDrivability and Comfort\u003c\/td\u003e \u003ctd\u003eLowest Cost, Highest Risk\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/div\u003e \u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQs)\u003c\/strong\u003e\u003c\/h3\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eQ1: The notes say it won’t produce enough vacuum for power brakes. What are my options?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e This is due to the aggressive camshaft with a tight 108-degree lobe separation angle. Your solutions are:\u003c\/p\u003e \u003col start=\"1\"\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eInstall a Vacuum Canister:\u003c\/strong\u003e Adds a reservoir to store vacuum for several brake applications.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eUpgrade to an Electric Vacuum Pump:\u003c\/strong\u003e Provides a consistent and reliable vacuum source specifically for brakes.\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eConvert to Manual Brakes:\u003c\/strong\u003e Eliminates the need for vacuum entirely.\u003c\/p\u003e \u003c\/li\u003e \u003c\/ol\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eQ2: Why is a 2,500+ RPM stall converter recommended?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e The aggressive camshaft makes very little power at low RPMs. A high-stall torque converter allows the engine to rev into its power band (where it makes real horsepower) before fully engaging the transmission. Without it, the car will feel very sluggish from a stop.\u003c\/p\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eQ3: Can I use this engine in my factory-equipped car?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e While it will physically fit in any classic Chevy engine bay, its functionality is not “factory.” You must address the power brake vacuum issue and, for automatic transmissions, install the recommended high-stall converter. It also \u003cstrong\u003erequires 91+ octane fuel\u003c\/strong\u003e.\u003c\/p\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eQ4: What is the difference between a “long block” and a “mid-dress” engine?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e A \u003cem\u003elong block\u003c\/em\u003e typically includes only the engine block, heads, and internal components. A \u003cem\u003emid-dress\u003c\/em\u003e or \u003cem\u003esemi-dress\u003c\/em\u003e engine includes many of the external components needed to run, such as the intake manifold, distributor, water pump, and valve covers, saving you significant cost and hassle.\u003c\/p\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eQ5: Is this a new or remanufactured engine?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e The ATK HP101M is classified as \u003cstrong\u003eremanufactured\u003c\/strong\u003e. It is built using a seasoned (used) OEM GM block that has been machined to exacting specifications and assembled with all-new performance internal and external components.\u003c\/p\u003e \u003ch3\u003e\u003cstrong\u003ePros and Cons\u003c\/strong\u003e\u003c\/h3\u003e \u003cdiv class=\"ds-scroll-area _1210dd7\"\u003e \u003cdiv class=\"ds-scroll-area__gutters\"\u003e \u003cdiv class=\"ds-scroll-area__horizontal-gutter\"\u003e \u003cdiv class=\"ds-scroll-area__horizontal-bar\"\u003e\u003c\/div\u003e \u003c\/div\u003e \u003cdiv class=\"ds-scroll-area__vertical-gutter\"\u003e\u003c\/div\u003e \u003c\/div\u003e \u003ctable\u003e \u003cthead\u003e \u003ctr\u003e \u003cth\u003ePros\u003c\/th\u003e \u003cth\u003eCons\u003c\/th\u003e \u003c\/tr\u003e \u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\n\u003cstrong\u003eTurn-Key Power:\u003c\/strong\u003e Massive 470 HP\/490 TQ output with a proven component combination.\u003c\/td\u003e \u003ctd\u003e\n\u003cstrong\u003eLow Vacuum Production:\u003c\/strong\u003e Cannot operate power brakes without an auxiliary vacuum pump or canister.\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\n\u003cstrong\u003eMid-Dress Convenience:\u003c\/strong\u003e Includes intake, distributor, water pump, and covers for easier installation.\u003c\/td\u003e \u003ctd\u003e\n\u003cstrong\u003eHigh-Stall TC Required:\u003c\/strong\u003e Needs a 2,500+ RPM stall converter for automatic transmissions to perform correctly.\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\n\u003cstrong\u003ePremium Components:\u003c\/strong\u003e Features Dart aluminum heads, forged internals, and an MSD distributor.\u003c\/td\u003e \u003ctd\u003e\n\u003cstrong\u003ePremium Fuel Required:\u003c\/strong\u003e Must run on 91 octane or higher to prevent detonation.\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\n\u003cstrong\u003eStrong Value:\u003c\/strong\u003e Cost-effective way to get a high-horsepower, complete package.\u003c\/td\u003e \u003ctd\u003e\n\u003cstrong\u003eAggressive Manners:\u003c\/strong\u003e The lumpy idle and power curve are not suited for docile street cruising.\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\n\u003cstrong\u003eHydraulic Roller Reliability:\u003c\/strong\u003e Offers the performance of a solid cam with easier maintenance and longevity.\u003c\/td\u003e \u003ctd\u003e\n\u003cstrong\u003eRemanufactured Core:\u003c\/strong\u003e Built on a used GM block, not a brand-new casting.\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/div\u003e \u003ch3\u003e\u003cstrong\u003eConclusion \u0026amp; Ideal Use Case\u003c\/strong\u003e\u003c\/h3\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eThe ATK HP101M 383 Stroker is a specialized tool for a specific job: delivering maximum, brutal horsepower in a street-legal package. It is not a gentle cruiser; it is a weapon for the drag strip that can be driven on the street.\u003c\/p\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eThis engine is perfectly suited for:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e1967-1981 Camaros, Novas, and Chevelles\u003c\/strong\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e1955-1957 Chevy Hot Rods\u003c\/strong\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eStreet\/Strip Pro-Touring builds\u003c\/strong\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eLightweight Track Cars\u003c\/strong\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eAny project where uncompromised power is the primary goal.\u003c\/strong\u003e\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003cp class=\"ds-markdown-paragraph\"\u003eIf you are building a weekend warrior or a strip-focused machine and are prepared to address its operational requirements (brakes, converter, fuel), the ATK HP101M offers an incredible power-to-dollar ratio and the visceral thrill only a big-cam stroker motor can provide.\u003c\/p\u003e","brand":"TITANPARTHUB","offers":[{"title":"Default Title","offer_id":52160940212455,"sku":null,"price":5998.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/7806\/3335\/files\/bac21772-gg-11.jpg?v=1780566355","url":"https:\/\/titanparthub.com\/products\/atk-high-performance-chevy-383-stroker-470-hp-mid-dress-long-block-crate-engines-hp101m","provider":"TITANPARTHUB","version":"1.0","type":"link"}