[84 400]

My truck came from the factory With the heavy half/ big ten suspention. So it has the 3 front leaf springs and the designation in the vin number. It has a single shock up front because they did not do the dual thing untill the 80's. I personally don't see the need for dual shocks just seems like extra money to me but then again I have never drove a dual shocker. I say if they are working leave it alone but if your gonna replace the shocks I would convert back to one and get some billstiens or ranchos instead of 2 cheepos.