everything i know is all hearsay, so it wouldn't surprise me if it's wrong(and i'm certainly not trying to sell it as fact either).
the cammer durability testing thing has been championed by fourcam330 for years now. i'm sure the engines they were testing for production use were a little different than the race engines, as i'm sure the coyote is as well.
the crank HP guesstimates i picked up from the griggs racing GT500 suspension install thread. the owner(i believe it was, it was a while ago) said that that's about what the FR500C's make.
as for the RPMs, i think it may have started with your C-C post('quite a bit more than 7,000'), people kept adding a few hundred RPM as it got passed along, then it ended up at 8,500+ by the time it got to me, LOL.
I have no idea about the durability testing, just going off my experience with the Cammer in Grand Am. It seems to handle 7200 rpm all day long. I've seen one over revved to 8800 on a missed downshift and it survived. It didn't run quite right afterwards and we changed it out but it still made the rest of the lap and ran later on, we didn't dare race it though.
Also on the HP, like I said, I've seen many FR500C's with the cammer dynoed on a dynojet. New they are all between 400-420rwhp. Even taking a 15% drivetrain loss that's not in the ballpark of 500-550. That is in Grand Am trim though. Maybe with some tinkering and ECU changes you could get 500-550 at the crank but that would not be a Grand Am spec engine. The Rolex engine is probably in that range but it is not the same engine that comes in the FR500C. I believe they are similar engines though, I think intake, exhaust and ECU are different, not sure about the internal stuff.
Yeah, I was trying to avoid giving an actual number before the race on the Coyote's redline. I figured after they had been run at a race it was free game. I was wondering how much people would think "quite a bit more than 7000" was. I personally thought 800 more RPM was pretty significant. FWIW, I have heard rumor the bottom end of the engine should be good for 8500, but I don't know how that could be verified since hearing that the ECU won't handle anything near that RPM. Until people actually get to start playing with them we really won't know.