I have a 66 442 Convertible that I would like to replace the coil springs, control arm bushings and steering. I would like to keep the original ride height but I am having a difficult time finding the springs. Do I go with Rubber, Polyurethane or Polygraphite Control arm bushings? I would like to use Moog ball joints, tie rods, and idler arm, but I am not sure what Centerlink and Pittman arm I should use. Thanks