need advise in a 318

thanks guys, alot of good info, as soon as i get the dart to the house ill send pictures of both and progress there-after, im sure ill have more questions the further i get into the drivetrain end of things. actually whats this i hear of a "mini tub" i get moving the leaf springs to the frame rails, but to run a 10 or 11 inch tire will that be enough????????