G32BTurbo

I took the head off my Mirage this weekend and it seems like the head is warped a little bit. Theres also a lot of rust in the coolant passages. Can anyone recommend a good machine shop that can take care of the head for me on the Peninsula? S&W on rt.17 was suggested to me, anyone hear anything about them? I'm also worried about the jet valves. I dont want them to break during disassembly. Any info is appreciated.