My pickup is pretty wicked. Trick flow top end, keith black bottom end, roller cam/rockers/gear drive. Bla, Bla...its sitting about 550hp best guess. I have run it up to 7k a time or two, but really, it makes me nervous. Now other than this 460, I've only driven Olds 455 big blocks. So seriously, where are you guys inclined to feel confident to set your redline? I just swapped in an intellitronix box and was debating with myself where to set the rev limiter. I was thinking 6k to play it safe, but I know this thing pulls hard to 6500 and keeps pulling until I chicken out and let off. I have maybe 10k miles on it and its a rhino, never objecting to high RPM, so I've considered setting it at 7k, but just to hear what you all think: Where to you feel that the risk of mechanical failure really sets in?