In over 200 dyno tests on "streetable" engines over a span of 25+ years, I don't think I've ever been able to gain 30-40 HP with just a cam change. I'd really like to see some documentation of someone doing that.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!