i think the 89+ has thicker leafs like 3" as where the earlier are 2 1/2. not sure on this though
6" usually refer to bolt holes center to center...
shackles only lift half the spring so if you have a 6" shackle and you put a 8" set on it would be a 1" difference.. unlike if you throw a 2" block in you would get 2" of lift...
lol... those shackles suck... but they work for me at the time being, and i ALWAYS carry my stockers, just in case lol
