I've never seen a 5speed Mach only put down 269 at the RWhP unless it's an auto and they are usually around 255 to low 260's. The early 03's had poor tunes but that graph would be less than 5 % of any Mach you'd ever see, 275-289 is the range these cars run and don't drop power as fast as the GT from what I've seen.
Guess we'll have to see at the track, the Fbodies are dyno queens also but we seem to do well running them stock for stock. I want to see an average not what a certain car is putting out. Some Mach's are in the 290's but that isn't typical. A member of the registry worked on both engines for Ford and claims the 4v is much stronger than the 3v motor on their dyno testing. Of course these first cars may have bad tunes, who knows.
It will be interesting, Tim is in businesss of making money so the latest and greatest is what will make him the most not the cars like the 03/04 Mach's or Cobra's. He does great tunes but seems to be more in the the Mod area than what a stock car tuned will make. If you want an SC he's at the top of the list but I bet he doesn't see too many stock cars in his business.