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**Captainfab** · 06-14-2014, 01:39 AM

You only need one pair since there are only shackles at the rear of the springs. The longer shackles when mounted in tension will lower the body of the truck by aprox 1/2 of the increased length of the shackle. IE: a 2" longer shackle will lower the rear aprox 1".

06-14-2014, 01:39 AM	#2
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: How do lowering shackles work? You only need one pair since there are only shackles at the rear of the springs. The longer shackles when mounted in tension will lower the body of the truck by aprox 1/2 of the increased length of the shackle. IE: a 2" longer shackle will lower the rear aprox 1". __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE Last edited by Captainfab; 06-14-2014 at 01:57 AM.