Are you booking through Enterprise Exotics or just regular Enterprise?
Either way, the cars in that category will be a Mustang, Camero, or Challenger.
I believe if you book from Exotics, you will be guaranteed a V8 whereas regular Enterprise does not guarantee that.
If you do go to Exotics, you will need all that documentation too. Exotics is a separate division from regular Enterprise. You will need to stop at the counter.