{"product_id":"qa1-rear-suspension-system-1973-1979-ford-f100-f150-swb","title":"QA1 Rear Suspension System for 1973-1979 Ford F-100 and F-150 SWB","description":"\u003ch4\u003eReplace the rear leaf spring layout with an adjustable torque arm and Watts link system.\u003c\/h4\u003e\n\u003cp\u003eQA1 part R121-200 is engineered for short wheelbase 1973-1979 Ford F-100 and F-150 trucks with a compatible iron third member.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTorque arm and adjustable Watts link rear suspension design\u003c\/li\u003e\n\u003cli\u003eSingle adjustable shocks with 18 damping positions\u003c\/li\u003e\n\u003cli\u003e200 lb\/in coil springs\u003c\/li\u003e\n\u003cli\u003eAdjustable lower trailing arms\u003c\/li\u003e\n\u003cli\u003eProvides an adjustable 4 to 7 inch drop\u003c\/li\u003e\n\u003cli\u003eBolt in installation with supplied brackets and hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eBody Requirement\u003c\/th\u003e\n\u003cth\u003eAxle Requirement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1973-1979\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-100\u003c\/td\u003e\n\u003ctd\u003eShort wheelbase only\u003c\/td\u003e\n\u003ctd\u003e9 inch axle with iron third member\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1973-1979\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-150\u003c\/td\u003e\n\u003ctd\u003eShort wheelbase only\u003c\/td\u003e\n\u003ctd\u003e9 inch axle with iron third member\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number\u003c\/td\u003e\n\u003ctd\u003eR121-200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePosition\u003c\/td\u003e\n\u003ctd\u003eRear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustment\u003c\/td\u003e\n\u003ctd\u003eSingle adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpring Rate\u003c\/td\u003e\n\u003ctd\u003e200 lb\/in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrop Range\u003c\/td\u003e\n\u003ctd\u003e4 to 7 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAxle Compatibility\u003c\/td\u003e\n\u003ctd\u003eStock or direct fit 9 inch axle with iron third member\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003ePowder coated tubular components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eR121-200: Watts link\u003c\/li\u003e\n\u003cli\u003eTorque arm\u003c\/li\u003e\n\u003cli\u003eAdjustable lower trailing arms\u003c\/li\u003e\n\u003cli\u003eBracket mounts\u003c\/li\u003e\n\u003cli\u003eSingle adjustable shocks\u003c\/li\u003e\n\u003cli\u003e200 lb\/in springs\u003c\/li\u003e\n\u003cli\u003eInstallation hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAbout QA1\u003c\/h4\u003e\n\u003cp\u003eQA1 develops adjustable suspension systems and components for classic trucks, muscle cars, and performance vehicles.\u003c\/p\u003e\n\u003ch4\u003eFAQ\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the R121-200?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is the exact manufacturer part number for this rear suspension system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit long bed trucks?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. This system is for short wheelbase trucks only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be used with an aluminum third member?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Aluminum third members are not compatible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat axle is required?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse the stock 1973-1979 Ford 9 inch axle with an iron third member or a direct fit aftermarket equivalent.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat spring rate is included?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe kit includes 200 lb\/in springs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much can it lower the truck?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe system provides an adjustable 4 to 7 inch drop.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the shocks adjustable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The supplied shocks are single adjustable with 18 damping positions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the kit require welding?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. This system is designed as a bolt in installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eBefore installing R121-200, support the vehicle securely and unload the rear suspension before beginning.\u003c\/li\u003e\n\u003cli\u003eInstall the supplied brackets, torque arm, trailing arms, Watts link, shocks, and springs following QA1 instructions.\u003c\/li\u003e\n\u003cli\u003eApply anti-seize to threaded shock bodies, set ride height only while unloaded, then complete a professional alignment and fastener check.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"QA1","offers":[{"title":"Default Title","offer_id":46492542140495,"sku":"QAPR121-200","price":2887.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/qa1-r121-200-rear-suspension-system-01.jpg?v=1787764980","url":"https:\/\/www.blackopsautoworks.com\/products\/qa1-rear-suspension-system-1973-1979-ford-f100-f150-swb","provider":"Black Ops Auto Works","version":"1.0","type":"link"}