Hy 69Cuda, according to the Raybestos online catalogue the 55 6400 uses BH4497 for the rear 16 7/8" long, for the front it uses BH4900 17.69" long. For the 58 it lists the same rear BH4497, but for the front it lists two possibilities BH25664 20" long, or BH36548 18 9/16". personally I would order the lines for the 55 and see if they will fit on the 58 as well, the lines can be ordered through RockAuto or I'm sure Napa could cross those part numbers, hope that helps.
