I can't WAIT to spray my car this spring, you just got me really fired up! Guess I know where that tax return is going...
As far as A/F goes, that is hugely dependent on the particular engine combo. You have to pull the plugs and check them out... if you are running too lean, then your plugs will have a bluish tinge to the entire plug.
Just right will have the strap showing a slightly bluish tinge, but the rest of spark plug should be normal.
A rich condition is a bit harder to tell, but you are obviously not running too rich!
Adam