When you stomp on it, Ford designed a valve to open so that the sound goes into the cabin. I found out that the way it works is that it doesn’t open until you’re in second gear or higher, and are doing at least 25 mph. This makes good sense when you think about it, and seems consistent with my test drive of the V8. There’s a YouTube vid showing how to take the foam out of the sound tubes to make the cabin noise louder. Not that I’d likely do that!
It looks to me like most dealers do what Grappone does: wait until they get only 1 or 2 on the lot, then order 4 or 5 more. They always seem to have between 0 and 6 cars on the lot, usually about 2 or 4. I had to do about 3 or 4 visits to get 2 test drives in the right car at the right time over 2 or 3 months. Though I should say one visit was just to see how a bass guitar case fit in the car. It fit amazingly well, I was surprised. I could even fit it in the trunk as well as the rear seat. Also, the rear seat flips down so the trunk space expands into the interior.