24 hours of thinking about what to do with the bike has led me to agree with the recommendations to restore it to what it was originally. Basically put the original bars back on and a new cable set. The other thing would be to replace the non-original 105 derailleur with the Dura Ace 7200 EX - if I can find one. A Google search has turned up only a couple on fleabay, both very well used and pricey considering their condition. Actually there was a new one also available for $400. Uh ... not going to happen. The Google search did bring another thought to mind ... I could sell the parts that are on the bike and make 3 or 4x what I paid for it. Uh ... not going to happen.

Thank you for the comments ... tomorrow morning I can start in earnest with the elbow grease.

One final thought. It's hard to imagine that 30 years ago we actually rode bikes with only 5, yes 5, gears in the back. How did I ever ride up all those hills?