{"product_id":"73-87-chevy-gmc-c10-squarebody-rear-frame-c-notch-kit-bolt-on","title":"73-87 Chevy \u0026 GMC C10 Squarebody Rear Frame C-Notch Kit (Bolt-On)","description":"\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e73-87 Frame C-Notch Kit - #130-4000 \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe GSI Rear Frame C-Notch Kit is the definitive solution for \u003cb\u003e1973-1987 Chevy \u0026amp; GMC trucks\u003c\/b\u003e that require increased axle clearance. When lowering a Squarebody more than 4 inches, the factory frame rail becomes a bottleneck for suspension travel. Our C-notch provides the necessary \"relief\" \u003cstrong\u003eto prevent harsh axle-to-frame contact\u003c\/strong\u003e, ensuring a smooth ride even on aggressive drops. Engineered for builders who want a \u003cb\u003eprofessional-grade foundation\u003c\/b\u003e without the complexity of a full back-half.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch4\u003eThe GSI Advantage\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eBolt-In Simplicity:\u003c\/b\u003e Unlike traditional \"weld-in only\" notches that require extensive fabrication and frame stripping, our kit is designed as a \u003cb\u003eprecision bolt-in unit\u003c\/b\u003e. This significantly reduces installation time and allows for a cleaner, more approachable DIY process.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eStructural Integrity:\u003c\/b\u003e While designed for a bolt-in application, the high-strength steel construction allows for optional welding for builders who prefer a fully integrated, permanent bond for high-horsepower or heavy-duty air ride builds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003ePreserved Suspension Geometry:\u003c\/b\u003e By allowing for proper upward travel, this kit prevents the \"bottoming out\" effect common in lowered trucks. This protects your shocks, bushings, and rear-end components from impact damage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eComplete Installation Solution:\u003c\/b\u003e We include a custom \u003cb\u003emetal installation template\u003c\/b\u003e to take the guesswork out of cutting your frame. This ensures your notches are perfectly centered and square every time.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003eDesign \u0026amp; Construction\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eWeight:\u003c\/b\u003e 26 lbs \u003cem\u003e(Total Kit)\u003c\/em\u003e \/ 13 lbs \u003cem\u003e(Per Notch)\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eDimensions:\u003c\/b\u003e 17\" x 3.5\" x 5\" \u003cem\u003e(Per Notch)\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e1\/4\" ASTM A1011 Hot-Rolled Steel:\u003c\/strong\u003e Laser-cut and formed for a strong, precise fit over the factory frame rails.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eGrade 8 Hardware:\u003c\/b\u003e Includes (26) 1\/2\"-13 heavy-duty bolts and Nylock nuts for a secure, vibration-resistant connection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eApplication-Specific:\u003c\/b\u003e Contoured specifically for the 1973-1987 GM C10\/K10 frame profile.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003eMeasurement \u0026amp; Fitment Guide\u003c\/h4\u003e\n\u003cp\u003eThis kit is purpose-built for the \u003cb\u003eGM Square Body platform \u003cem\u003e(1973-1987)\u003c\/em\u003e\u003c\/b\u003e. While it is a \"universal\" fit for this specific year range of Chevy and GMC trucks, please verify your suspension setup before installation.\u003c\/p\u003e\n\u003ch4\u003eWhen to use this kit:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eRear Drops:\u003c\/b\u003e Mandatory for rear drops of 4\" or greater.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eAir Ride Systems:\u003c\/b\u003e Highly recommended for all air suspension applications to allow the truck to \"lay frame\" or achieve maximum drop.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eStatic Drops:\u003c\/b\u003e Ideal for flip-kit setups or lowered leaf spring configurations that experience frequent bottoming out.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003eVehicle Applications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e1973-1987 Chevy C10 (\u003cem\u003e2WD)\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e1973-1987 GMC C15 \u003cem\u003e(2WD)\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003eWhat’s Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e(2)\u003c\/strong\u003e Rear Frame C-Notches\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e(1) \u003c\/strong\u003eMetal Installation Template\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e(26)\u003c\/strong\u003e 1\/2\"-13 x 1.25\" Bolts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e(26)\u003c\/strong\u003e 1\/2\"-13 Nylock Nuts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e(54)\u003c\/strong\u003e 1\/2\" Washers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003eQuestions? Contact Us\u003c\/h4\u003e\n\u003cp\u003e\u003cspan\u003e(480) 940 1806 – \u003cstrong\u003eLocal\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e1 (877) 951-1890 – \u003cstrong\u003eToll Free\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"GSI Machine and Fabrication","offers":[{"title":"Default Title","offer_id":50499631153212,"sku":"130-4000","price":229.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5934\/4956\/files\/130-4001-1.jpg?v=1790048241","url":"https:\/\/rpm-racing.com\/products\/73-87-chevy-gmc-c10-squarebody-rear-frame-c-notch-kit-bolt-on","provider":"Racing Precision Motorsports","version":"1.0","type":"link"}