503 Motoring: 5703 SW Arctic Drive, Beaverton, OR. Don't know much about them accept whats on the website. Looks overpriced or just out of my price range
Modern Classics Auto- 5717 SW Jean Rd, Lake Oswego, Oregon. this is the only shop Ive been to, Steve is a great guy, and can tune the he!! out of LS engines.
Tom's Performance Machine- 6707 NE 117th Ave, Vancouver, WA. Ive called and talked to the guys there, well known by the NHRA crowd and good rep.
Wong's Performance Engineering- 9305 NE Highway 99, Vancouver, WA. Very talented tuner, and a fav on LS1tech.
Ellis- Monroe, WA. mentioned above, but Ive never came across it.
FAST Specialties- 1200 NE 95th St Vancouver WA, 98556. I got a friend that had a CTS-V they worked on and tuned, and it was nice! But I've also heard some bad stories as well.
CarbConn-13611 NE 126th Pl. Kirkland, WA First time hearing of it.
Paradise Auto Care- 15575 SW 74th Ave Tigard, OR 97224. Fully capable Shop, great rep, and great builders.
Portland Speed Industries-Great shop, can do everything....but a bit out of my pricerange