Far Cry 4 has a very cool map editor. Mad Max is a very cool movie. Both feature shitty old cars. You know where this is going.
This custom Future Dead Australia map for the game isn't some elaborate mod; it's just a map, so you can download it (these vids are from PS4), take advantage of Far Cry 4's existing range of beat-up old cars and have at it like you're the Road Warrior himself.