I have the same relationship with a couple companies that I won't deal with any more

The only Machine shop I recommend is called Dougans Machine in Riverside (on Limonite between 15 and Van Buren Blvd). The specialize in performance engine work (no production overhauls any more)
Dougan's Engine & Machine3
9072 Limonite Ave
Riverside, CA 92509
951-681-1961
The main thing you need to do (at any shop), is make sure everything you want done is writen down. Don't leave it up to somebody's memory, because when something didn't get done and there is no documentation your out of luck!
I recommend go in and talk to the guys at a couple shops and pick the one that gives you the best feel (warm and fuzzy

)