Ballpark ~400. The time cleaning and measuring valves and guides was a good portion of that I'm sure. Quite happy with the work on the head and block (block work was a different charge)
Re: cleaning the valves. My machine shop did. They absolutely looked brand new. He also shaved the head - don't know how much. Very minimal. He said straight 6s are so long that they "always" warp.
20k miles since, the beast runs great. Knock wood!
Good luck with your setup