if you mean the 63 inch chevies sellthem to some one else, they are really thick and wont mix with toy leaves
get a set of 2wd F150 extended cab springs, 88-94 they will give you 5 inches then use a longer shackle
2wd F150 rears will give you that much lift in the rear of the runner? How much longer are they then the stock runner rears (1984 runner)