Pretty bicycle.

1. A guess here, but 62cm + seat tube, maybe the same on the top tube. Does the frameset fit you properly? Are you 6'2" +?

2. Leave the tubulars on the bicycle. Not so tough to change tires once you get the hang of it. Can't beat the ride of a decent tubular.

3. Nice try on bars, but they should be rewrapped pronto with the cables running on the rider side of the bars. We can post some pics to help you do this properly.

4. No biggie to put on a Campy derailleur when you get a chance. Ride the bike the way it is till you find one.

5 and 6. Don't touch the paint. Clean/protect the finish with Mother's products. That sun in Texas is tough business.

Overall, a fun bicycle. How do you know it is a 1979? Just wondering on your dating method.

...and don't forget to ask for help.