i got the 4inch ord shackled flip.so some 56's off a 1/2ton long bed stock and my shackle flip should give me about about 5-6 inchs of lift if i were to keep bout the same shackle angle? because the rear end of a long bed sits higher then the front. are 4wd and 2wd rear springs the same?? how much would the rear end move back like? an inch or two?