The cams we are using don't have any special treatment that I know of. Tim Goolsby @ Ultradyne said they verify the hardness depth somehow. Sorry I don't have any other detail. My cam core was new and Eric's was a re-grind because they just didn't have any cores. We are both using Crower cam saver lifters with the little EDM hole in the foot for additional oiling. All 16 lifter holes restricted to .035"-.040" oil holes if I remember correctly. Get lots of oil through those little holes. I use the little distributor oil hole in the rear plug as well.
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