IT LIVES!!!! Thursday the Yukon passed smog with flying colors! got the registration knocked out the same day and have driven her every day since. Even put the old girl to work Friday as a stump puller...
As for everything that I have done (since last year)...
Eliminated the vacuum boost suspecting a intermittent vacuum leak- upgraded to hydroboost. What a difference in braking force too! I also installed the factory power steering cooler. I'll post more on that later.
Head bolt re-torque
Valve adjustment
Plugs, wires, cap and rotor (not that it needed it)
Rebuilt fuel pressure regulator- modified FPR to be adjustable
Throttle body mods shown above
From the little driving I have done so far, I have to say that the throttle body mods were WORTH IT!! I can feel a difference in acceleration, as well as less throttle effort at cruising speed. I will be interested to see how it does on some longer runs.