i have a 1995 jeep wrangler rio grande and its all stock right now. i want to put 31'' tires on it and i know i can only fit 30'' without any lift. so i found a body lift on JC Whitney, the link is below. I want to know if a body lift is all i need to make 31's fit? i dont know if getting a body lift vs. a shackle lift or any other type makes a difference or if one is right. if the one in the link works thats all i care because it's cheap. please help.