On the round track engines we built, cam break-in was done on the dyno with stock valve springs, then the heads were pulled and the triple springs were installed. That would be overkill on a street engine. I wonder how much attention was given to cam break-in at the factory?
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!