I've been degreeing cams for about 50 years, and I've never met anyone, including the guy I shave every morning, who can eyeball a cam and tell if it's ground for hydraulic or solid lifters. The difference between a solid lifter and a hydraulic lifter cam is a tiny, but vitally important area where the lobe meets the base circle, one that can only be measured with a dial indicator and a degree wheel.
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!