I appreciate all of your help in trying to find the culprit of my Univega's "mouse in the drivetrain".
I went to a good mechanic today and first he thought it was still the pulleys- so he yanks off the new ones I installed and greased the side washers as well as the bushing and voila! It was still squealing!
Short story long, it turned out to be the 22 year-old chain making the noise, even though it had no rust and enough oil on it for a Roman orgy.
New chain installed, problem solved for $15.00!