{"product_id":"63-72-chevy-gmc-c10-rear-frame-crossmember-bolt-on","title":"63-72 Chevy \u0026 GMC C10 Rear Frame Crossmember (Bolt-On)","description":"\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e63-72 Rear Frame Crossmember - # 120-5600\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eOur \u003cstrong\u003ebolt-in \u003c\/strong\u003erear frame crossmember is designed specifically for \u003cstrong\u003e1963-1972 C10 chassis\u003c\/strong\u003e to \u003cstrong\u003erestore structural integrity\u003c\/strong\u003e after a backhalf or rear frame modification.\u003c\/p\u003e\n\u003cp\u003eWhen lowering a truck, the factory rear frame structure is often cut or removed, leaving the frame rails unsupported. This crossmember \u003cstrong\u003eties the rear of the frame back together\u003c\/strong\u003e, keeping the rails square, rigid, and capable of handling suspension and drivetrain loads without flex or long-term fatigue.\u003c\/p\u003e\n\u003cp\u003eUnlike weld-only options, this crossmember features \u003cstrong\u003esliding inlays that insert into the frame rails\u003c\/strong\u003e, providing a strong connection and precise alignment before bolting everything together. The result is a clean install with excellent strength and repeatable fitment.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned specifically for \u003cstrong\u003e1963-1972 C10 frames\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRestores strength\u003c\/strong\u003e after backhalf or notch modifications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePrevents rear frame rail flex, twist, \u0026amp; cracking\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBolt-in \u003c\/strong\u003edesign with internal frame\u003cstrong\u003e inlays for added support\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eDesign \u0026amp; Construction\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eASTM A1011\u003c\/strong\u003e hot-rolled steel \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePrecision-cut for consistent fitment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInternal \u003cstrong\u003eframe inlays slide into the frame rails\u003c\/strong\u003e for added strength\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eDimensions \u0026amp; Specs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 12 lbs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 33 inches\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFrame Rail Inlays:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHeight: 3.5 inches\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDepth: 2 inches\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCrossmember Face:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHeight: 4 inches\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDepth: approx. 1.5–2.0 inches\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e1963-1972 Chevy \u0026amp; GMC C10 Trucks\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eInlays slide into frame rails to align with OEM bed mount holes.\u003cem\u003e (Longer bolts may be required for bed variant)\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOn rare occasions,\u003c\/strong\u003e since the stock frame rails have nothing supporting the rear, they tend to bow in over time, narrowing close to an inch; this will require spreading the frame rails via porta power or another accessible tool.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWelding not required\u003c\/strong\u003e \u003cem\u003e(can be welded if desired)\u003c\/em\u003e\u003cem\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e(1)\u003c\/strong\u003e Rear Frame Crossmember with Logo\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003e(2) \u003c\/b\u003e3\/8\"\u003cb\u003e \u003c\/b\u003ex 1.25\" Bolts\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e(4)\u003c\/strong\u003e 3\/8\" Washers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e(2)\u003c\/strong\u003e 3\/8 Nylock Nuts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e(2) \u003c\/strong\u003e1\/2\" x 1.25 Bolts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e(4)\u003c\/strong\u003e 1\/2\" Washers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e(2)\u003c\/strong\u003e 1\/2\" Nylock Nuts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003eCalifornia Proposition 65 Warning\u003c\/h4\u003e\n\u003cp\u003eCancer and Reproductive Harm – \u003ca rel=\"noopener\" class=\"decorated-link\" href=\"http:\/\/www.p65warnings.ca.gov\"\u003ewww.p65warnings.ca.gov\u003c\/a\u003e\u003c\/p\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":50499626598460,"sku":"120-5600-RFCM","price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5934\/4956\/files\/Transparent_angle_adobe.png?v=1790048185","url":"https:\/\/rpm-racing.com\/products\/63-72-chevy-gmc-c10-rear-frame-crossmember-bolt-on","provider":"Racing Precision Motorsports","version":"1.0","type":"link"}