I'm not aware of a shop that can properly detail those carbs and manifold locally in Phoenix, AZ. The place that is referred to in this forum a lot and is THE source for pontiac tri power stuff is John and Mike at Pontiac Tri Power (
www.pontiactripower.com). You can e-mail them and send photos of your manifold and carbs and they will reply with information on what you will need, about how much it will cost, etc. I almost used them to restore a factory manifold with carbs I bought back in 2013, but I ended up just selling it instead and using my factory manifold and 4 bbl. You can buy the parts and do some of the work yourself, or they can do it for you and ship you back a ready-to-install manifold with the carbs fully functioning.
If you want more info on Pontiac Tri Power, open a new thread in the Pontiac "Street" section and ask for some help. Lots of people have worked with Pontiac Tri Power for their restorations. Good luck!