Even custom cams aren't perfect

Tolerances can stack. To the machining/quality of the crank, timing set components, and cam, I'll add the block machining. I run the Summit billet sets and tensioner on small blocks. The worst I've seen was an MP camshaft and that was the last one I ever ran. The important thing is you degreed it, noted the difference, and put it where it needs to be. That's what's important here.