A non-stock cam could have whatever "clearance ramp" the cam grinder chose to put onto the lobe profile. The only way to tell for sure is to use a degree wheel and a dial indicator, and plot the cam profile on a piece of graph paper. I've been doing that on racing cams for 50+ years to check the accuracy of the lobes, and/or check for wear on a used cam after the racing season is over.
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!