I am slowly (boy do I mean slowly) bring a 55 Tbird back to life. I read posts and it prompts questions in my mind.  I am accumulating various posts in a notebook to provide information to the machine shop when it comes time to start the engine work.  I know FEs and 289 real well but not Yblocks.  Two new questions come to mind.

Valves: I see reference to changing the valve guides from time to time and don't understand what is meant by that can someone in lighten me?

Carburetor:  My car's engine at one time had the 57 manifold and carb added.  I have been wavering between originality and performance (for example got my hands on some G heads real cheap to use during the build).  I am toying with the blue thunder manifold for the Tpot carb so I can retain an original look to the car.  Question is Is the Tpot a piece of junk compared to the 57 carb?

Build Question:  Has anyone put together a list of the best build changes to make when putting a Yblock back together?