Valve job with head gasket replacement?

famous bob said

quick lap all of them, will tell how wide the seats are, how far out on the valves their seating, make sure their sealing!

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I grind my own valves, so I just lap some to be sure nothing has gone wrong with my system. If I was getting a valve job the first time, from someone I did not know and trust, you are absolutely right. Of course if it is a bad valve job, you won't have to do them all to figure that out. I could tell a story or two.