The 39 has an independent front suspension that has been used up through the early to mid 50s. All Mopar cars used the same basic suspension and frame design through 49. Look at any tread covering 39-49 Plymouth, Dodge, or Chrysler, they have been well covered here already. You can learn how to update the suspension, brakes, steering, and how to install nearly any engine known to man, of course we will lead you towards installing a Mopar in your Mopar. Gene