Fastest land speed creature with HD of 8 or less?

In the interest of haunt shifting an undead creature into a carriage and getting the carriage to go fast, I am looking for what the haunting’s base creature should be. With templates, most creatures could be made undead, so we’re looking for:

  1. A creature that is, or can be made, undead
  2. Without getting above 8HD
  3. Featuring the highest available base walking speed
  4. Being controllable in a permanent manner by its method of creation or otherwise
  5. With as little ‘exotic material’ as possible – keep is as simple as we can.