I was/am happy with Pape' Kenworth in Donald, Oregon just south of 205 a few miles. I took mine in for very specific service and provided my own materials and they worked with me adapting to what I wanted rather than controlling the situation with their own parts etc. I compare it to an experience with 2 dentists one time. I went in complaining of a lost filing and one dentist did a full exam, and totaled the full workscope to be about $7000. I said I only wanted the tooth refilled. That dentist said "No, I'll only do the whole job or nothing", so I went to another dentist and they filled the tooth and offered me other optional services.
This is my experience at Pape' in Donald. Easy to work with, then used my oil, my filters, my transmission fluid and filters, and simply charged me for their time. I didn't have an air filter so they quickly got me one from a nearby Napa. They let me watch the process.
I did ask for a quote for the valve job you're talking about and it was somewhere in the $400's 3 years ago. I did call Cat Petersen on Columbia Blvd and they had a little cheaper price. I've not had the service done as I believe it has almost certainly been done by two former owners even though its NOT in Cat's system. My engine's performance has been great and I just don't like the idea of opening it up. Maybe someone here can give me some confidence to do so.
Mike