I finished the bike today. Final weight 19.95 lb . I weighed it 3 times just to be sure it wasn't touching something that would change the weight.
Per previous comment about the bars, what was shown was the grips just barely over the ends so I could weigh it. in finished form the bars are just right.
I had to change the brake levers. The shiny ones were actually for V brakes. The (new) ones were probably a few grams heavier.

I switched the original Tri color mech for 105 because the new crank was a triple and using the middle position for the single chainring made the chain line better.

There might be a few grams more I could take off if I was REALLY motivated and rich but I am more than satisfied with the results as is.
I created a very light bike without going crazy and the cost was nothing as all the parts were in the bins at the Bike Exchange.
As well as the lightening I also repainted the bike. masking off all the grey areas and spraying Rustoleum Automotive white over the existing white parts after treating it for rust and spot priming.
Then I took off the masking and clear coated the entire frame and fork. If you look real close you can still see some of the original pitting under the new paint but all things considered I think it came out pretty good.